[PATCH] Import setenv and unsetenv from gnulib

Anton Kolesov
2017-07-03T16:27:54Z

This patch supersedes
https://sourceware.org/ml/gdb-patches/2017-07/msg00009.html

---

Patch [1] broke a build on MinGW hosts, because MinGW doesn't provide POSIX
functions setenv () and unsetenv (). This can be fixed by using
implementations from gnulib.

[1] https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=9a6c7d9c0

gdb/ChangeLog
yyyy-mm-dd Anton Kolesov <Anton.Kolesov@synopsys.com>

* gnulib/update-gnulib.sh (IMPORTED_GNULIB_MODULES): Add setenv and
unsetenv.
* gnulib/aclocal.m4: Regenerate.
* gnulib/config.in: Regenerate.
* gnulib/configure: Regenerate.
* gnulib/import/Makefile.am: Regenerate.
* gnulib/import/Makefile.in: Regenerate.
* gnulib/import/m4/gnulib-cache.m4: Regenerate.
* gnulib/import/m4/gnulib-comp.m4: Regenerate.
* gnulib/import/m4/environ.m4: New file.
* gnulib/import/m4/setenv.m4: New file.
* gnulib/import/setenv.c: New file.
* gnulib/import/unsetenv.c: New file.
---
gdb/gnulib/aclocal.m4 | 2 +
gdb/gnulib/config.in | 35 ++++
gdb/gnulib/configure | 391 ++++++++++++++++++++++++++++++++++-
gdb/gnulib/import/Makefile.am | 20 +-
gdb/gnulib/import/Makefile.in | 12 +-
gdb/gnulib/import/m4/environ.m4 | 47 +++++
gdb/gnulib/import/m4/gnulib-cache.m4 | 4 +-
gdb/gnulib/import/m4/gnulib-comp.m4 | 20 ++
gdb/gnulib/import/m4/setenv.m4 | 160 ++++++++++++++
gdb/gnulib/import/setenv.c | 390 ++++++++++++++++++++++++++++++++++
gdb/gnulib/import/unsetenv.c | 127 ++++++++++++
gdb/gnulib/update-gnulib.sh | 2 +
12 files changed, 1201 insertions(+), 9 deletions(-)
create mode 100644 gdb/gnulib/import/m4/environ.m4
create mode 100644 gdb/gnulib/import/m4/setenv.m4
create mode 100644 gdb/gnulib/import/setenv.c
create mode 100644 gdb/gnulib/import/unsetenv.c

diff --git a/gdb/gnulib/aclocal.m4 b/gdb/gnulib/aclocal.m4
index cd0dd5d..a4ce6a6 100644
--- a/gdb/gnulib/aclocal.m4
+++ b/gdb/gnulib/aclocal.m4
@@ -1023,6 +1023,7 @@ m4_include([import/m4/dirfd.m4])
m4_include([import/m4/dirname.m4])
m4_include([import/m4/double-slash-root.m4])
m4_include([import/m4/eealloc.m4])
+m4_include([import/m4/environ.m4])
m4_include([import/m4/errno_h.m4])
m4_include([import/m4/exponentd.m4])
m4_include([import/m4/exponentl.m4])
@@ -1071,6 +1072,7 @@ m4_include([import/m4/rawmemchr.m4])
m4_include([import/m4/readlink.m4])
m4_include([import/m4/rename.m4])
m4_include([import/m4/rmdir.m4])
+m4_include([import/m4/setenv.m4])
m4_include([import/m4/signal_h.m4])
m4_include([import/m4/ssize_t.m4])
m4_include([import/m4/stat.m4])
diff --git a/gdb/gnulib/config.in b/gdb/gnulib/config.in
index 057b12d..6061520 100644
--- a/gdb/gnulib/config.in
+++ b/gdb/gnulib/config.in
@@ -95,6 +95,9 @@
/* Define to 1 when the gnulib module dirfd should be tested. */
#undef GNULIB_TEST_DIRFD

+/* Define to 1 when the gnulib module environ should be tested. */
+#undef GNULIB_TEST_ENVIRON
+
/* Define to 1 when the gnulib module frexp should be tested. */
#undef GNULIB_TEST_FREXP

@@ -140,6 +143,9 @@
/* Define to 1 when the gnulib module rmdir should be tested. */
#undef GNULIB_TEST_RMDIR

+/* Define to 1 when the gnulib module setenv should be tested. */
+#undef GNULIB_TEST_SETENV
+
/* Define to 1 when the gnulib module stat should be tested. */
#undef GNULIB_TEST_STAT

@@ -152,6 +158,9 @@
/* Define to 1 when the gnulib module strtok_r should be tested. */
#undef GNULIB_TEST_STRTOK_R

+/* Define to 1 when the gnulib module unsetenv should be tested. */
+#undef GNULIB_TEST_UNSETENV
+
/* Define to 1 if you have 'alloca' after including <alloca.h>, a header that
may be supplied by this distribution. */
#undef HAVE_ALLOCA
@@ -201,6 +210,10 @@
*/
#undef HAVE_DECL_MEMMEM

+/* Define to 1 if you have the declaration of `setenv', and to 0 if you don't.
+ */
+#undef HAVE_DECL_SETENV
+
/* Define to 1 if you have the declaration of `strtok_r', and to 0 if you
don't. */
#undef HAVE_DECL_STRTOK_R
@@ -209,12 +222,19 @@
don't. */
#undef HAVE_DECL_TOWLOWER

+/* Define to 1 if you have the declaration of `unsetenv', and to 0 if you
+ don't. */
+#undef HAVE_DECL_UNSETENV
+
/* Define to 1 if you have the <dirent.h> header file. */
#undef HAVE_DIRENT_H

/* Define to 1 if you have the `dirfd' function. */
#undef HAVE_DIRFD

+/* Define if you have the declaration of environ. */
+#undef HAVE_ENVIRON_DECL
+
/* Define to 1 if you have the <features.h> header file. */
#undef HAVE_FEATURES_H

@@ -1126,6 +1146,12 @@
/* Define to 1 if 'long double' and 'double' have the same representation. */
#undef HAVE_SAME_LONG_DOUBLE_AS_DOUBLE

+/* Define to 1 if you have the <search.h> header file. */
+#undef HAVE_SEARCH_H
+
+/* Define to 1 if you have the `setenv' function. */
+#undef HAVE_SETENV
+
/* Define to 1 if 'sig_atomic_t' is a signed integer type. */
#undef HAVE_SIGNED_SIG_ATOMIC_T

@@ -1189,9 +1215,15 @@
/* Define to 1 if you have the `towlower' function. */
#undef HAVE_TOWLOWER

+/* Define to 1 if you have the `tsearch' function. */
+#undef HAVE_TSEARCH
+
/* Define to 1 if you have the <unistd.h> header file. */
#undef HAVE_UNISTD_H

+/* Define to 1 if you have the `unsetenv' function. */
+#undef HAVE_UNSETENV
+
/* Define to 1 if the system has the type 'unsigned long long int'. */
#undef HAVE_UNSIGNED_LONG_LONG_INT

@@ -1407,6 +1439,9 @@
#endif

+/* Define to 1 if unsetenv returns void instead of int. */
+#undef VOID_UNSETENV
+
/* Define to l, ll, u, ul, ull, etc., as suitable for constants of type
'wchar_t'. */
#undef WCHAR_T_SUFFIX
diff --git a/gdb/gnulib/configure b/gdb/gnulib/configure
index d214164..2a0dfc2 100644
--- a/gdb/gnulib/configure
+++ b/gdb/gnulib/configure
@@ -3307,6 +3307,7 @@ as_fn_append ac_func_list " readlink"
as_fn_append ac_func_list " realpath"
as_fn_append ac_header_list " sys/param.h"
as_fn_append ac_header_list " dirent.h"
+as_fn_append ac_header_list " unistd.h"
as_fn_append ac_func_list " btowc"
as_fn_append ac_func_list " isblank"
as_fn_append ac_func_list " iswctype"
@@ -3324,7 +3325,6 @@ as_fn_append ac_header_list " limits.h"
as_fn_append ac_header_list " wchar.h"
as_fn_append ac_header_list " stdint.h"
as_fn_append ac_header_list " inttypes.h"
-as_fn_append ac_header_list " unistd.h"
as_fn_append ac_func_list " symlink"
as_fn_append ac_func_list " lstat"
as_fn_append ac_header_list " math.h"
@@ -3333,6 +3333,7 @@ as_fn_append ac_func_list " mbrtowc"
as_fn_append ac_header_list " sys/mman.h"
as_fn_append ac_func_list " mprotect"
as_fn_append ac_func_list " link"
+as_fn_append ac_func_list " setenv"
as_fn_append ac_header_list " sys/stat.h"
as_fn_append ac_header_list " features.h"
as_fn_append ac_func_list " iswcntrl"
@@ -5311,6 +5312,7 @@ fi
# Code from module dirname-lgpl:
# Code from module dosname:
# Code from module double-slash-root:
+ # Code from module environ:
# Code from module errno:
# Code from module extensions:
# Code from module extern-inline:
@@ -5352,6 +5354,7 @@ fi
# Code from module rename:
# Code from module rmdir:
# Code from module same-inode:
+ # Code from module setenv:
# Code from module signal-h:
# Code from module snippet/_Noreturn:
# Code from module snippet/arg-nonnull:
@@ -5376,6 +5379,7 @@ fi
# Code from module sys_types:
# Code from module time:
# Code from module unistd:
+ # Code from module unsetenv:
# Code from module update-copyright:
# Code from module verify:
# Code from module wchar:
@@ -6826,6 +6830,59 @@ $as_echo "$gl_cv_pragma_columns" >&6; }

+
+
+
+
+
+
+
+ { $as_echo "$as_me:${as_lineno-$LINENO}: checking if environ is properly declared" >&5
+$as_echo_n "checking if environ is properly declared... " >&6; }
+ if test "${gt_cv_var_environ_declaration+set}" = set; then :
+ $as_echo_n "(cached) " >&6
+else
+
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+#if HAVE_UNISTD_H
+ #include <unistd.h>
+ #endif
+ /* mingw, BeOS, Haiku declare environ in <stdlib.h>, not in <unistd.h>. */
+ #include <stdlib.h>
+
+ extern struct { int foo; } environ;
+int
+main ()
+{
+environ.foo = 1;
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+ gt_cv_var_environ_declaration=no
+else
+ gt_cv_var_environ_declaration=yes
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+
+ { $as_echo "$as_me:${as_lineno-$LINENO}: result: $gt_cv_var_environ_declaration" >&5
+$as_echo "$gt_cv_var_environ_declaration" >&6; }
+ if test $gt_cv_var_environ_declaration = yes; then
+
+$as_echo "#define HAVE_ENVIRON_DECL 1" >>confdefs.h
+
+ fi
+
+
+ if test $gt_cv_var_environ_declaration != yes; then
+ HAVE_DECL_ENVIRON=0
+ fi
+
+
+
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for complete errno.h" >&5
$as_echo_n "checking for complete errno.h... " >&6; }
if test "${gl_cv_header_errno_h_complete+set}" = set; then :
@@ -9919,8 +9976,6 @@ $as_echo "#define HAVE_LANGINFO_CODESET 1" >>confdefs.h

-
-
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for working fcntl.h" >&5
$as_echo_n "checking for working fcntl.h... " >&6; }
if test "${gl_cv_header_working_fcntl_h+set}" = set; then :
@@ -11411,6 +11466,55 @@ $as_echo "$gl_cv_func_memmem_works_always" >&6; }

+ac_fn_c_check_decl "$LINENO" "setenv" "ac_cv_have_decl_setenv" "$ac_includes_default"
+if test "x$ac_cv_have_decl_setenv" = x""yes; then :
+ ac_have_decl=1
+else
+ ac_have_decl=0
+fi
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_DECL_SETENV $ac_have_decl
+_ACEOF
+
+
+
+
+
+
+ if test $ac_cv_have_decl_setenv = no; then
+ HAVE_DECL_SETENV=0
+ fi
+
+
+
+
+
+ for ac_header in search.h
+do :
+ ac_fn_c_check_header_mongrel "$LINENO" "search.h" "ac_cv_header_search_h" "$ac_includes_default"
+if test "x$ac_cv_header_search_h" = x""yes; then :
+ cat >>confdefs.h <<_ACEOF
+#define HAVE_SEARCH_H 1
+_ACEOF
+
+fi
+
+done
+
+ for ac_func in tsearch
+do :
+ ac_fn_c_check_func "$LINENO" "tsearch" "ac_cv_func_tsearch"
+if test "x$ac_cv_func_tsearch" = x""yes; then :
+ cat >>confdefs.h <<_ACEOF
+#define HAVE_TSEARCH 1
+_ACEOF
+
+fi
+done
+
+
+

GNULIB_PTHREAD_SIGMASK=0;
GNULIB_RAISE=0;
@@ -12246,6 +12350,17 @@ $as_echo "$gl_cv_next_time_h" >&6; }

+ac_fn_c_check_decl "$LINENO" "unsetenv" "ac_cv_have_decl_unsetenv" "$ac_includes_default"
+if test "x$ac_cv_have_decl_unsetenv" = x""yes; then :
+ ac_have_decl=1
+else
+ ac_have_decl=0
+fi
+
+cat >>confdefs.h <<_ACEOF
+#define HAVE_DECL_UNSETENV $ac_have_decl
+_ACEOF
+

{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether <wchar.h> uses 'inline' correctly" >&5
$as_echo_n "checking whether <wchar.h> uses 'inline' correctly... " >&6; }
@@ -12917,6 +13032,22 @@ $as_echo "#define DOUBLE_SLASH_IS_DISTINCT_ROOT 1" >>confdefs.h

+
+
+
+ GNULIB_ENVIRON=1
+
+
+
+
+
+$as_echo "#define GNULIB_TEST_ENVIRON 1" >>confdefs.h
+
+
+
+
+
+
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for flexible array member" >&5
$as_echo_n "checking for flexible array member... " >&6; }
if test "${ac_cv_c_flexmember+set}" = set; then :
@@ -17099,6 +17230,102 @@ $as_echo "#define GNULIB_TEST_RMDIR 1" >>confdefs.h

+ if test $ac_cv_func_setenv = no; then
+ HAVE_SETENV=0
+ else
+ { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether setenv validates arguments" >&5
+$as_echo_n "checking whether setenv validates arguments... " >&6; }
+if test "${gl_cv_func_setenv_works+set}" = set; then :
+ $as_echo_n "(cached) " >&6
+else
+ if test "$cross_compiling" = yes; then :
+ case "$host_os" in
+ # Guess yes on glibc systems.
+ *-gnu*) gl_cv_func_setenv_works="guessing yes" ;;
+ # If we don't know, assume the worst.
+ *) gl_cv_func_setenv_works="guessing no" ;;
+ esac
+
+else
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+ #include <stdlib.h>
+ #include <errno.h>
+ #include <string.h>
+
+int
+main ()
+{
+
+ int result = 0;
+ {
+ if (setenv ("", "", 0) != -1)
+ result |= 1;
+ else if (errno != EINVAL)
+ result |= 2;
+ }
+ {
+ if (setenv ("a", "=", 1) != 0)
+ result |= 4;
+ else if (strcmp (getenv ("a"), "=") != 0)
+ result |= 8;
+ }
+ return result;
+
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"; then :
+ gl_cv_func_setenv_works=yes
+else
+ gl_cv_func_setenv_works=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+ conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_setenv_works" >&5
+$as_echo "$gl_cv_func_setenv_works" >&6; }
+ case "$gl_cv_func_setenv_works" in
+ *yes) ;;
+ *)
+ REPLACE_SETENV=1
+ ;;
+ esac
+ fi
+
+ if test $HAVE_SETENV = 0 || test $REPLACE_SETENV = 1; then
+
+
+
+
+
+
+
+
+ gl_LIBOBJS="$gl_LIBOBJS setenv.$ac_objext"
+
+ fi
+
+
+
+
+
+ GNULIB_SETENV=1
+
+
+
+
+
+$as_echo "#define GNULIB_TEST_SETENV 1" >>confdefs.h
+
+
+
+
+

@@ -18642,6 +18869,164 @@ fi

+ if test $ac_cv_have_decl_unsetenv = no; then
+ HAVE_DECL_UNSETENV=0
+ fi
+ for ac_func in unsetenv
+do :
+ ac_fn_c_check_func "$LINENO" "unsetenv" "ac_cv_func_unsetenv"
+if test "x$ac_cv_func_unsetenv" = x""yes; then :
+ cat >>confdefs.h <<_ACEOF
+#define HAVE_UNSETENV 1
+_ACEOF
+
+fi
+done
+
+ if test $ac_cv_func_unsetenv = no; then
+ HAVE_UNSETENV=0
+ else
+ HAVE_UNSETENV=1
+ { $as_echo "$as_me:${as_lineno-$LINENO}: checking for unsetenv() return type" >&5
+$as_echo_n "checking for unsetenv() return type... " >&6; }
+if test "${gt_cv_func_unsetenv_ret+set}" = set; then :
+ $as_echo_n "(cached) " >&6
+else
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+#undef _BSD
+#define _BSD 1 /* unhide unsetenv declaration in OSF/1 5.1 <stdlib.h> */
+#include <stdlib.h>
+extern
+#ifdef __cplusplus
+"C"
+#endif
+int unsetenv (const char *name);
+
+int
+main ()
+{
+
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+ gt_cv_func_unsetenv_ret='int'
+else
+ gt_cv_func_unsetenv_ret='void'
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $gt_cv_func_unsetenv_ret" >&5
+$as_echo "$gt_cv_func_unsetenv_ret" >&6; }
+ if test $gt_cv_func_unsetenv_ret = 'void'; then
+
+$as_echo "#define VOID_UNSETENV 1" >>confdefs.h
+
+ REPLACE_UNSETENV=1
+ fi
+
+ { $as_echo "$as_me:${as_lineno-$LINENO}: checking whether unsetenv obeys POSIX" >&5
+$as_echo_n "checking whether unsetenv obeys POSIX... " >&6; }
+if test "${gl_cv_func_unsetenv_works+set}" = set; then :
+ $as_echo_n "(cached) " >&6
+else
+ if test "$cross_compiling" = yes; then :
+ case "$host_os" in
+ # Guess yes on glibc systems.
+ *-gnu*) gl_cv_func_unsetenv_works="guessing yes" ;;
+ # If we don't know, assume the worst.
+ *) gl_cv_func_unsetenv_works="guessing no" ;;
+ esac
+
+else
+ cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h. */
+
+ #include <stdlib.h>
+ #include <errno.h>
+ extern char **environ;
+
+int
+main ()
+{
+
+ char entry1[] = "a=1";
+ char entry2[] = "b=2";
+ char *env[] = { entry1, entry2, NULL };
+ if (putenv ((char *) "a=1")) return 1;
+ if (putenv (entry2)) return 2;
+ entry2[0] = 'a';
+ unsetenv ("a");
+ if (getenv ("a")) return 3;
+ if (!unsetenv ("") || errno != EINVAL) return 4;
+ entry2[0] = 'b';
+ environ = env;
+ if (!getenv ("a")) return 5;
+ entry2[0] = 'a';
+ unsetenv ("a");
+ if (getenv ("a")) return 6;
+
+ ;
+ return 0;
+}
+_ACEOF
+if ac_fn_c_try_run "$LINENO"; then :
+ gl_cv_func_unsetenv_works=yes
+else
+ gl_cv_func_unsetenv_works=no
+fi
+rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
+ conftest.$ac_objext conftest.beam conftest.$ac_ext
+fi
+
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $gl_cv_func_unsetenv_works" >&5
+$as_echo "$gl_cv_func_unsetenv_works" >&6; }
+ case "$gl_cv_func_unsetenv_works" in
+ *yes) ;;
+ *)
+ REPLACE_UNSETENV=1
+ ;;
+ esac
+ fi
+
+ if test $HAVE_UNSETENV = 0 || test $REPLACE_UNSETENV = 1; then
+
+
+
+
+
+
+
+
+ gl_LIBOBJS="$gl_LIBOBJS unsetenv.$ac_objext"
+
+
+
+
+
+ fi
+
+
+
+
+
+ GNULIB_UNSETENV=1
+
+
+
+
+
+$as_echo "#define GNULIB_TEST_UNSETENV 1" >>confdefs.h
+
+
+
+
+
+

diff --git a/gdb/gnulib/import/Makefile.am b/gdb/gnulib/import/Makefile.am
index baa03a5..26f249d 100644
--- a/gdb/gnulib/import/Makefile.am
+++ b/gdb/gnulib/import/Makefile.am
@@ -21,7 +21,7 @@
# the same distribution terms as the rest of that program.
#
# Generated by gnulib-tool.
-# Reproduce by: gnulib-tool --import --lib=libgnu --source-base=import --m4-base=import/m4 --doc-base=doc --tests-base=tests --aux-dir=import/extra --no-conditional-dependencies --no-libtool --macro-prefix=gl --no-vc-files alloca canonicalize-lgpl dirent dirfd errno fnmatch-gnu frexpl inttypes limits-h lstat memchr memmem pathmax rawmemchr readlink rename signal-h strchrnul strstr strtok_r sys_stat unistd update-copyright wchar wctype-h
+# Reproduce by: gnulib-tool --import --lib=libgnu --source-base=import --m4-base=import/m4 --doc-base=doc --tests-base=tests --aux-dir=import/extra --no-conditional-dependencies --no-libtool --macro-prefix=gl --no-vc-files alloca canonicalize-lgpl dirent dirfd errno fnmatch-gnu frexpl inttypes limits-h lstat memchr memmem pathmax rawmemchr readlink rename setenv signal-h strchrnul strstr strtok_r sys_stat unistd unsetenv update-copyright wchar wctype-h

AUTOMAKE_OPTIONS = 1.9.6 gnits

@@ -928,6 +928,15 @@ EXTRA_DIST += same-inode.h

## end gnulib module same-inode

+## begin gnulib module setenv
+
+
+EXTRA_DIST += setenv.c
+
+EXTRA_libgnu_a_SOURCES += setenv.c
+
+## end gnulib module setenv
+
## begin gnulib module signal-h

BUILT_SOURCES += signal.h
@@ -1862,6 +1871,15 @@ EXTRA_DIST += unistd.in.h

## end gnulib module unistd

+## begin gnulib module unsetenv
+
+
+EXTRA_DIST += unsetenv.c
+
+EXTRA_libgnu_a_SOURCES += unsetenv.c
+
+## end gnulib module unsetenv
+
## begin gnulib module update-copyright

diff --git a/gdb/gnulib/import/Makefile.in b/gdb/gnulib/import/Makefile.in
index d45d7ea..ca7a73d 100644
--- a/gdb/gnulib/import/Makefile.in
+++ b/gdb/gnulib/import/Makefile.in
@@ -36,7 +36,7 @@
# the same distribution terms as the rest of that program.
#
# Generated by gnulib-tool.
-# Reproduce by: gnulib-tool --import --lib=libgnu --source-base=import --m4-base=import/m4 --doc-base=doc --tests-base=tests --aux-dir=import/extra --no-conditional-dependencies --no-libtool --macro-prefix=gl --no-vc-files alloca canonicalize-lgpl dirent dirfd errno fnmatch-gnu frexpl inttypes limits-h lstat memchr memmem pathmax rawmemchr readlink rename signal-h strchrnul strstr strtok_r sys_stat unistd update-copyright wchar wctype-h
+# Reproduce by: gnulib-tool --import --lib=libgnu --source-base=import --m4-base=import/m4 --doc-base=doc --tests-base=tests --aux-dir=import/extra --no-conditional-dependencies --no-libtool --macro-prefix=gl --no-vc-files alloca canonicalize-lgpl dirent dirfd errno fnmatch-gnu frexpl inttypes limits-h lstat memchr memmem pathmax rawmemchr readlink rename setenv signal-h strchrnul strstr strtok_r sys_stat unistd unsetenv update-copyright wchar wctype-h

@@ -74,6 +74,7 @@ am__aclocal_m4_deps = $(top_srcdir)/import/m4/00gnulib.m4 \
$(top_srcdir)/import/m4/dirname.m4 \
$(top_srcdir)/import/m4/double-slash-root.m4 \
$(top_srcdir)/import/m4/eealloc.m4 \
+ $(top_srcdir)/import/m4/environ.m4 \
$(top_srcdir)/import/m4/errno_h.m4 \
$(top_srcdir)/import/m4/exponentd.m4 \
$(top_srcdir)/import/m4/exponentl.m4 \
@@ -122,6 +123,7 @@ am__aclocal_m4_deps = $(top_srcdir)/import/m4/00gnulib.m4 \
$(top_srcdir)/import/m4/readlink.m4 \
$(top_srcdir)/import/m4/rename.m4 \
$(top_srcdir)/import/m4/rmdir.m4 \
+ $(top_srcdir)/import/m4/setenv.m4 \
$(top_srcdir)/import/m4/signal_h.m4 \
$(top_srcdir)/import/m4/ssize_t.m4 \
$(top_srcdir)/import/m4/stat.m4 \
@@ -1289,7 +1291,7 @@ EXTRA_DIST = m4/gnulib-cache.m4 alloca.c alloca.in.h \
mbrtowc.c mbsinit.c mbsrtowcs-impl.h mbsrtowcs-state.c \
mbsrtowcs.c memchr.c memchr.valgrind memmem.c str-two-way.h \
pathmax.h rawmemchr.c rawmemchr.valgrind readlink.c rename.c \
- rmdir.c same-inode.h signal.in.h \
+ rmdir.c same-inode.h setenv.c signal.in.h \
$(top_srcdir)/import/extra/snippet/_Noreturn.h \
$(top_srcdir)/import/extra/snippet/arg-nonnull.h \
$(top_srcdir)/import/extra/snippet/c++defs.h \
@@ -1297,7 +1299,7 @@ EXTRA_DIST = m4/gnulib-cache.m4 alloca.c alloca.in.h \
stdbool.in.h stddef.in.h stdint.in.h stdio.in.h stdlib.in.h \
strchrnul.c strchrnul.valgrind streq.h string.in.h \
str-two-way.h strstr.c strtok_r.c sys_stat.in.h sys_time.in.h \
- sys_types.in.h time.in.h unistd.in.h \
+ sys_types.in.h time.in.h unistd.in.h unsetenv.c \
$(top_srcdir)/import/extra/update-copyright verify.h \
wchar.in.h wctype.in.h

@@ -1343,7 +1345,7 @@ EXTRA_libgnu_a_SOURCES = alloca.c canonicalize-lgpl.c dirfd.c float.c \
gettimeofday.c isnan.c isnand.c isnan.c isnanl.c lstat.c \
malloc.c mbrtowc.c mbsinit.c mbsrtowcs-state.c mbsrtowcs.c \
memchr.c memmem.c rawmemchr.c readlink.c rename.c rmdir.c \
- stat.c strchrnul.c strstr.c strtok_r.c
+ setenv.c stat.c strchrnul.c strstr.c strtok_r.c unsetenv.c

# Use this preprocessor expression to decide whether #include_next works.
# Do not rely on a 'configure'-time test for this, since the expression
@@ -1449,6 +1451,7 @@ distclean-compile:
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/readlink.Po@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/rename.Po@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/rmdir.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/setenv.Po@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/stat.Po@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/strchrnul.Po@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/stripslash.Po@am__quote@
@@ -1456,6 +1459,7 @@ distclean-compile:
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/strstr.Po@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/strtok_r.Po@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/unistd.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/unsetenv.Po@am__quote@
@AMDEP_TRUE@@am__include@ @am__quote@./$(DEPDIR)/wctype-h.Po@am__quote@

.c.o:
diff --git a/gdb/gnulib/import/m4/environ.m4 b/gdb/gnulib/import/m4/environ.m4
new file mode 100644
index 0000000..9a0ea7e
--- /dev/null
+++ b/gdb/gnulib/import/m4/environ.m4
@@ -0,0 +1,47 @@
+# environ.m4 serial 6
+dnl Copyright (C) 2001-2004, 2006-2016 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN_ONCE([gl_ENVIRON],
+[
+ AC_REQUIRE([gl_UNISTD_H_DEFAULTS])
+ dnl Persuade glibc <unistd.h> to declare environ.
+ AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS])
+
+ AC_CHECK_HEADERS_ONCE([unistd.h])
+ gt_CHECK_VAR_DECL(
+ [#if HAVE_UNISTD_H
+ #include <unistd.h>
+ #endif
+ /* mingw, BeOS, Haiku declare environ in <stdlib.h>, not in <unistd.h>. */
+ #include <stdlib.h>
+ ],
+ [environ])
+ if test $gt_cv_var_environ_declaration != yes; then
+ HAVE_DECL_ENVIRON=0
+ fi
+])
+
+# Check if a variable is properly declared.
+# gt_CHECK_VAR_DECL(includes,variable)
+AC_DEFUN([gt_CHECK_VAR_DECL],
+[
+ define([gt_cv_var], [gt_cv_var_]$2[_declaration])
+ AC_MSG_CHECKING([if $2 is properly declared])
+ AC_CACHE_VAL([gt_cv_var], [
+ AC_COMPILE_IFELSE(
+ [AC_LANG_PROGRAM(
+ [[$1
+ extern struct { int foo; } $2;]],
+ [[$2.foo = 1;]])],
+ [gt_cv_var=no],
+ [gt_cv_var=yes])])
+ AC_MSG_RESULT([$gt_cv_var])
+ if test $gt_cv_var = yes; then
+ AC_DEFINE([HAVE_]m4_translit($2, [a-z], [A-Z])[_DECL], 1,
+ [Define if you have the declaration of $2.])
+ fi
+ undefine([gt_cv_var])
+])
diff --git a/gdb/gnulib/import/m4/gnulib-cache.m4 b/gdb/gnulib/import/m4/gnulib-cache.m4
index f99e59b..c4ebb73 100644
--- a/gdb/gnulib/import/m4/gnulib-cache.m4
+++ b/gdb/gnulib/import/m4/gnulib-cache.m4
@@ -27,7 +27,7 @@

# Specification in the form of a command-line invocation:
-# gnulib-tool --import --lib=libgnu --source-base=import --m4-base=import/m4 --doc-base=doc --tests-base=tests --aux-dir=import/extra --no-conditional-dependencies --no-libtool --macro-prefix=gl --no-vc-files alloca canonicalize-lgpl dirent dirfd errno fnmatch-gnu frexpl inttypes limits-h lstat memchr memmem pathmax rawmemchr readlink rename signal-h strchrnul strstr strtok_r sys_stat unistd update-copyright wchar wctype-h
+# gnulib-tool --import --lib=libgnu --source-base=import --m4-base=import/m4 --doc-base=doc --tests-base=tests --aux-dir=import/extra --no-conditional-dependencies --no-libtool --macro-prefix=gl --no-vc-files alloca canonicalize-lgpl dirent dirfd errno fnmatch-gnu frexpl inttypes limits-h lstat memchr memmem pathmax rawmemchr readlink rename setenv signal-h strchrnul strstr strtok_r sys_stat unistd unsetenv update-copyright wchar wctype-h

# Specification in the form of a few gnulib-tool.m4 macro invocations:
gl_LOCAL_DIR([])
@@ -48,12 +48,14 @@ gl_MODULES([
rawmemchr
readlink
rename
+ setenv
signal-h
strchrnul
strstr
strtok_r
sys_stat
unistd
+ unsetenv
update-copyright
wchar
wctype-h
diff --git a/gdb/gnulib/import/m4/gnulib-comp.m4 b/gdb/gnulib/import/m4/gnulib-comp.m4
index 42d04ed..5a36567 100644
--- a/gdb/gnulib/import/m4/gnulib-comp.m4
+++ b/gdb/gnulib/import/m4/gnulib-comp.m4
@@ -53,6 +53,7 @@ AC_DEFUN([gl_EARLY],
# Code from module dirname-lgpl:
# Code from module dosname:
# Code from module double-slash-root:
+ # Code from module environ:
# Code from module errno:
# Code from module extensions:
# Code from module extern-inline:
@@ -94,6 +95,7 @@ AC_DEFUN([gl_EARLY],
# Code from module rename:
# Code from module rmdir:
# Code from module same-inode:
+ # Code from module setenv:
# Code from module signal-h:
# Code from module snippet/_Noreturn:
# Code from module snippet/arg-nonnull:
@@ -118,6 +120,7 @@ AC_DEFUN([gl_EARLY],
# Code from module sys_types:
# Code from module time:
# Code from module unistd:
+ # Code from module unsetenv:
# Code from module update-copyright:
# Code from module verify:
# Code from module wchar:
@@ -160,6 +163,8 @@ AC_DEFUN([gl_INIT],
gl_DIRENT_MODULE_INDICATOR([dirfd])
gl_DIRNAME_LGPL
gl_DOUBLE_SLASH_ROOT
+ gl_ENVIRON
+ gl_UNISTD_MODULE_INDICATOR([environ])
gl_HEADER_ERRNO_H
AC_REQUIRE([gl_EXTERN_INLINE])
AC_C_FLEXIBLE_ARRAY_MEMBER
@@ -285,6 +290,11 @@ AC_DEFUN([gl_INIT],
AC_LIBOBJ([rmdir])
fi
gl_UNISTD_MODULE_INDICATOR([rmdir])
+ gl_FUNC_SETENV
+ if test $HAVE_SETENV = 0 || test $REPLACE_SETENV = 1; then
+ AC_LIBOBJ([setenv])
+ fi
+ gl_STDLIB_MODULE_INDICATOR([setenv])
gl_SIGNAL_H
gt_TYPE_SSIZE_T
gl_FUNC_STAT
@@ -328,6 +338,12 @@ AC_DEFUN([gl_INIT],
AC_PROG_MKDIR_P
gl_HEADER_TIME_H
gl_UNISTD_H
+ gl_FUNC_UNSETENV
+ if test $HAVE_UNSETENV = 0 || test $REPLACE_UNSETENV = 1; then
+ AC_LIBOBJ([unsetenv])
+ gl_PREREQ_UNSETENV
+ fi
+ gl_STDLIB_MODULE_INDICATOR([unsetenv])
gl_WCHAR_H
gl_WCTYPE_H
# End of code from modules
@@ -533,6 +549,7 @@ AC_DEFUN([gl_FILE_LIST], [
lib/rename.c
lib/rmdir.c
lib/same-inode.h
+ lib/setenv.c
lib/signal.in.h
lib/stat.c
lib/stdbool.in.h
@@ -556,6 +573,7 @@ AC_DEFUN([gl_FILE_LIST], [
lib/time.in.h
lib/unistd.c
lib/unistd.in.h
+ lib/unsetenv.c
lib/verify.h
lib/wchar.in.h
lib/wctype-h.c
@@ -571,6 +589,7 @@ AC_DEFUN([gl_FILE_LIST], [
m4/dirname.m4
m4/double-slash-root.m4
m4/eealloc.m4
+ m4/environ.m4
m4/errno_h.m4
m4/exponentd.m4
m4/exponentl.m4
@@ -618,6 +637,7 @@ AC_DEFUN([gl_FILE_LIST], [
m4/readlink.m4
m4/rename.m4
m4/rmdir.m4
+ m4/setenv.m4
m4/signal_h.m4
m4/ssize_t.m4
m4/stat.m4
diff --git a/gdb/gnulib/import/m4/setenv.m4 b/gdb/gnulib/import/m4/setenv.m4
new file mode 100644
index 0000000..5d49aba
--- /dev/null
+++ b/gdb/gnulib/import/m4/setenv.m4
@@ -0,0 +1,160 @@
+# setenv.m4 serial 26
+dnl Copyright (C) 2001-2004, 2006-2016 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_SETENV],
+[
+ AC_REQUIRE([gl_FUNC_SETENV_SEPARATE])
+ AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+ if test $ac_cv_func_setenv = no; then
+ HAVE_SETENV=0
+ else
+ AC_CACHE_CHECK([whether setenv validates arguments],
+ [gl_cv_func_setenv_works],
+ [AC_RUN_IFELSE([AC_LANG_PROGRAM([[
+ #include <stdlib.h>
+ #include <errno.h>
+ #include <string.h>
+ ]], [[
+ int result = 0;
+ {
+ if (setenv ("", "", 0) != -1)
+ result |= 1;
+ else if (errno != EINVAL)
+ result |= 2;
+ }
+ {
+ if (setenv ("a", "=", 1) != 0)
+ result |= 4;
+ else if (strcmp (getenv ("a"), "=") != 0)
+ result |= 8;
+ }
+ return result;
+ ]])],
+ [gl_cv_func_setenv_works=yes], [gl_cv_func_setenv_works=no],
+ [case "$host_os" in
+ # Guess yes on glibc systems.
+ *-gnu*) gl_cv_func_setenv_works="guessing yes" ;;
+ # If we don't know, assume the worst.
+ *) gl_cv_func_setenv_works="guessing no" ;;
+ esac
+ ])])
+ case "$gl_cv_func_setenv_works" in
+ *yes) ;;
+ *)
+ REPLACE_SETENV=1
+ ;;
+ esac
+ fi
+])
+
+# Like gl_FUNC_SETENV, except prepare for separate compilation
+# (no REPLACE_SETENV, no AC_LIBOBJ).
+AC_DEFUN([gl_FUNC_SETENV_SEPARATE],
+[
+ AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
+ AC_CHECK_DECLS_ONCE([setenv])
+ if test $ac_cv_have_decl_setenv = no; then
+ HAVE_DECL_SETENV=0
+ fi
+ AC_CHECK_FUNCS_ONCE([setenv])
+ gl_PREREQ_SETENV
+])
+
+AC_DEFUN([gl_FUNC_UNSETENV],
+[
+ AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
+ AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
+ AC_CHECK_DECLS_ONCE([unsetenv])
+ if test $ac_cv_have_decl_unsetenv = no; then
+ HAVE_DECL_UNSETENV=0
+ fi
+ AC_CHECK_FUNCS([unsetenv])
+ if test $ac_cv_func_unsetenv = no; then
+ HAVE_UNSETENV=0
+ else
+ HAVE_UNSETENV=1
+ dnl Some BSDs return void, failing to do error checking.
+ AC_CACHE_CHECK([for unsetenv() return type], [gt_cv_func_unsetenv_ret],
+ [AC_COMPILE_IFELSE(
+ [AC_LANG_PROGRAM(
+ [[
+#undef _BSD
+#define _BSD 1 /* unhide unsetenv declaration in OSF/1 5.1 <stdlib.h> */
+#include <stdlib.h>
+extern
+#ifdef __cplusplus
+"C"
+#endif
+int unsetenv (const char *name);
+ ]],
+ [[]])],
+ [gt_cv_func_unsetenv_ret='int'],
+ [gt_cv_func_unsetenv_ret='void'])])
+ if test $gt_cv_func_unsetenv_ret = 'void'; then
+ AC_DEFINE([VOID_UNSETENV], [1], [Define to 1 if unsetenv returns void
+ instead of int.])
+ REPLACE_UNSETENV=1
+ fi
+
+ dnl Solaris 10 unsetenv does not remove all copies of a name.
+ dnl Haiku alpha 2 unsetenv gets confused by assignment to environ.
+ dnl OpenBSD 4.7 unsetenv("") does not fail.
+ AC_CACHE_CHECK([whether unsetenv obeys POSIX],
+ [gl_cv_func_unsetenv_works],
+ [AC_RUN_IFELSE([AC_LANG_PROGRAM([[
+ #include <stdlib.h>
+ #include <errno.h>
+ extern char **environ;
+ ]], [[
+ char entry1[] = "a=1";
+ char entry2[] = "b=2";
+ char *env[] = { entry1, entry2, NULL };
+ if (putenv ((char *) "a=1")) return 1;
+ if (putenv (entry2)) return 2;
+ entry2[0] = 'a';
+ unsetenv ("a");
+ if (getenv ("a")) return 3;
+ if (!unsetenv ("") || errno != EINVAL) return 4;
+ entry2[0] = 'b';
+ environ = env;
+ if (!getenv ("a")) return 5;
+ entry2[0] = 'a';
+ unsetenv ("a");
+ if (getenv ("a")) return 6;
+ ]])],
+ [gl_cv_func_unsetenv_works=yes], [gl_cv_func_unsetenv_works=no],
+ [case "$host_os" in
+ # Guess yes on glibc systems.
+ *-gnu*) gl_cv_func_unsetenv_works="guessing yes" ;;
+ # If we don't know, assume the worst.
+ *) gl_cv_func_unsetenv_works="guessing no" ;;
+ esac
+ ])])
+ case "$gl_cv_func_unsetenv_works" in
+ *yes) ;;
+ *)
+ REPLACE_UNSETENV=1
+ ;;
+ esac
+ fi
+])
+
+# Prerequisites of lib/setenv.c.
+AC_DEFUN([gl_PREREQ_SETENV],
+[
+ AC_REQUIRE([AC_FUNC_ALLOCA])
+ AC_REQUIRE([gl_ENVIRON])
+ AC_CHECK_HEADERS_ONCE([unistd.h])
+ AC_CHECK_HEADERS([search.h])
+ AC_CHECK_FUNCS([tsearch])
+])
+
+# Prerequisites of lib/unsetenv.c.
+AC_DEFUN([gl_PREREQ_UNSETENV],
+[
+ AC_REQUIRE([gl_ENVIRON])
+ AC_CHECK_HEADERS_ONCE([unistd.h])
+])
diff --git a/gdb/gnulib/import/setenv.c b/gdb/gnulib/import/setenv.c
new file mode 100644
index 0000000..85c32cb
--- /dev/null
+++ b/gdb/gnulib/import/setenv.c
@@ -0,0 +1,390 @@
+/* Copyright (C) 1992, 1995-2003, 2005-2016 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
+
+#if !_LIBC
+/* Don't use __attribute__ __nonnull__ in this compilation unit. Otherwise gcc
+ optimizes away the name == NULL test below. */
+# define _GL_ARG_NONNULL(params)
+
+# define _GL_USE_STDLIB_ALLOC 1
+# include <config.h>
+#endif
+
+#include <alloca.h>
+
+/* Specification. */
+#include <stdlib.h>
+
+#include <errno.h>
+#ifndef __set_errno
+# define __set_errno(ev) ((errno) = (ev))
+#endif
+
+#include <string.h>
+#if _LIBC || HAVE_UNISTD_H
+# include <unistd.h>
+#endif
+
+#if !_LIBC
+# include "malloca.h"
+#endif
+
+#if _LIBC || !HAVE_SETENV
+
+#if !_LIBC
+# define __environ environ
+#endif
+
+#if _LIBC
+/* This lock protects against simultaneous modifications of 'environ'. */
+# include <bits/libc-lock.h>
+__libc_lock_define_initialized (static, envlock)
+# define LOCK __libc_lock_lock (envlock)
+# define UNLOCK __libc_lock_unlock (envlock)
+#else
+# define LOCK
+# define UNLOCK
+#endif
+
+/* In the GNU C library we must keep the namespace clean. */
+#ifdef _LIBC
+# define setenv __setenv
+# define clearenv __clearenv
+# define tfind __tfind
+# define tsearch __tsearch
+#endif
+
+/* In the GNU C library implementation we try to be more clever and
+ allow arbitrarily many changes of the environment given that the used
+ values are from a small set. Outside glibc this will eat up all
+ memory after a while. */
+#if defined _LIBC || (defined HAVE_SEARCH_H && defined HAVE_TSEARCH \
+ && defined __GNUC__)
+# define USE_TSEARCH 1
+# include <search.h>
+typedef int (*compar_fn_t) (const void *, const void *);
+
+/* This is a pointer to the root of the search tree with the known
+ values. */
+static void *known_values;
+
+# define KNOWN_VALUE(Str) \
+ ({ \
+ void *value = tfind (Str, &known_values, (compar_fn_t) strcmp); \
+ value != NULL ? *(char **) value : NULL; \
+ })
+# define STORE_VALUE(Str) \
+ tsearch (Str, &known_values, (compar_fn_t) strcmp)
+
+#else
+# undef USE_TSEARCH
+
+# define KNOWN_VALUE(Str) NULL
+# define STORE_VALUE(Str) do { } while (0)
+
+#endif
+
+
+/* If this variable is not a null pointer we allocated the current
+ environment. */
+static char **last_environ;
+
+
+/* This function is used by 'setenv' and 'putenv'. The difference between
+ the two functions is that for the former must create a new string which
+ is then placed in the environment, while the argument of 'putenv'
+ must be used directly. This is all complicated by the fact that we try
+ to reuse values once generated for a 'setenv' call since we can never
+ free the strings. */
+int
+__add_to_environ (const char *name, const char *value, const char *combined,
+ int replace)
+{
+ char **ep;
+ size_t size;
+ const size_t namelen = strlen (name);
+ const size_t vallen = value != NULL ? strlen (value) + 1 : 0;
+
+ LOCK;
+
+ /* We have to get the pointer now that we have the lock and not earlier
+ since another thread might have created a new environment. */
+ ep = __environ;
+
+ size = 0;
+ if (ep != NULL)
+ {
+ for (; *ep != NULL; ++ep)
+ if (!strncmp (*ep, name, namelen) && (*ep)[namelen] == '=')
+ break;
+ else
+ ++size;
+ }
+
+ if (ep == NULL || *ep == NULL)
+ {
+ char **new_environ;
+#ifdef USE_TSEARCH
+ char *new_value;
+#endif
+
+ /* We allocated this space; we can extend it. */
+ new_environ =
+ (char **) (last_environ == NULL
+ ? malloc ((size + 2) * sizeof (char *))
+ : realloc (last_environ, (size + 2) * sizeof (char *)));
+ if (new_environ == NULL)
+ {
+ /* It's easier to set errno to ENOMEM than to rely on the
+ 'malloc-posix' and 'realloc-posix' gnulib modules. */
+ __set_errno (ENOMEM);
+ UNLOCK;
+ return -1;
+ }
+
+ /* If the whole entry is given add it. */
+ if (combined != NULL)
+ /* We must not add the string to the search tree since it belongs
+ to the user. */
+ new_environ[size] = (char *) combined;
+ else
+ {
+ /* See whether the value is already known. */
+#ifdef USE_TSEARCH
+# ifdef _LIBC
+ new_value = (char *) alloca (namelen + 1 + vallen);
+ __mempcpy (__mempcpy (__mempcpy (new_value, name, namelen), "=", 1),
+ value, vallen);
+# else
+ new_value = (char *) malloca (namelen + 1 + vallen);
+ if (new_value == NULL)
+ {
+ __set_errno (ENOMEM);
+ UNLOCK;
+ return -1;
+ }
+ memcpy (new_value, name, namelen);
+ new_value[namelen] = '=';
+ memcpy (&new_value[namelen + 1], value, vallen);
+# endif
+
+ new_environ[size] = KNOWN_VALUE (new_value);
+ if (new_environ[size] == NULL)
+#endif
+ {
+ new_environ[size] = (char *) malloc (namelen + 1 + vallen);
+ if (new_environ[size] == NULL)
+ {
+#if defined USE_TSEARCH && !defined _LIBC
+ freea (new_value);
+#endif
+ __set_errno (ENOMEM);
+ UNLOCK;
+ return -1;
+ }
+
+#ifdef USE_TSEARCH
+ memcpy (new_environ[size], new_value, namelen + 1 + vallen);
+#else
+ memcpy (new_environ[size], name, namelen);
+ new_environ[size][namelen] = '=';
+ memcpy (&new_environ[size][namelen + 1], value, vallen);
+#endif
+ /* And save the value now. We cannot do this when we remove
+ the string since then we cannot decide whether it is a
+ user string or not. */
+ STORE_VALUE (new_environ[size]);
+ }
+#if defined USE_TSEARCH && !defined _LIBC
+ freea (new_value);
+#endif
+ }
+
+ if (__environ != last_environ)
+ memcpy ((char *) new_environ, (char *) __environ,
+ size * sizeof (char *));
+
+ new_environ[size + 1] = NULL;
+
+ last_environ = __environ = new_environ;
+ }
+ else if (replace)
+ {
+ char *np;
+
+ /* Use the user string if given. */
+ if (combined != NULL)
+ np = (char *) combined;
+ else
+ {
+#ifdef USE_TSEARCH
+ char *new_value;
+# ifdef _LIBC
+ new_value = alloca (namelen + 1 + vallen);
+ __mempcpy (__mempcpy (__mempcpy (new_value, name, namelen), "=", 1),
+ value, vallen);
+# else
+ new_value = malloca (namelen + 1 + vallen);
+ if (new_value == NULL)
+ {
+ __set_errno (ENOMEM);
+ UNLOCK;
+ return -1;
+ }
+ memcpy (new_value, name, namelen);
+ new_value[namelen] = '=';
+ memcpy (&new_value[namelen + 1], value, vallen);
+# endif
+
+ np = KNOWN_VALUE (new_value);
+ if (np == NULL)
+#endif
+ {
+ np = (char *) malloc (namelen + 1 + vallen);
+ if (np == NULL)
+ {
+#if defined USE_TSEARCH && !defined _LIBC
+ freea (new_value);
+#endif
+ __set_errno (ENOMEM);
+ UNLOCK;
+ return -1;
+ }
+
+#ifdef USE_TSEARCH
+ memcpy (np, new_value, namelen + 1 + vallen);
+#else
+ memcpy (np, name, namelen);
+ np[namelen] = '=';
+ memcpy (&np[namelen + 1], value, vallen);
+#endif
+ /* And remember the value. */
+ STORE_VALUE (np);
+ }
+#if defined USE_TSEARCH && !defined _LIBC
+ freea (new_value);
+#endif
+ }
+
+ *ep = np;
+ }
+
+ UNLOCK;
+
+ return 0;
+}
+
+int
+setenv (const char *name, const char *value, int replace)
+{
+ if (name == NULL || *name == '\0' || strchr (name, '=') != NULL)
+ {
+ __set_errno (EINVAL);
+ return -1;
+ }
+
+ return __add_to_environ (name, value, NULL, replace);
+}
+
+/* The 'clearenv' was planned to be added to POSIX.1 but probably
+ never made it. Nevertheless the POSIX.9 standard (POSIX bindings
+ for Fortran 77) requires this function. */
+int
+clearenv (void)
+{
+ LOCK;
+
+ if (__environ == last_environ && __environ != NULL)
+ {
+ /* We allocated this environment so we can free it. */
+ free (__environ);
+ last_environ = NULL;
+ }
+
+ /* Clear the environment pointer removes the whole environment. */
+ __environ = NULL;
+
+ UNLOCK;
+
+ return 0;
+}
+
+#ifdef _LIBC
+static void
+free_mem (void)
+{
+ /* Remove all traces. */
+ clearenv ();
+
+ /* Now remove the search tree. */
+ __tdestroy (known_values, free);
+ known_values = NULL;
+}
+text_set_element (__libc_subfreeres, free_mem);
+
+
+# undef setenv
+# undef clearenv
+weak_alias (__setenv, setenv)
+weak_alias (__clearenv, clearenv)
+#endif
+
+#endif /* _LIBC || !HAVE_SETENV */
+
+/* The rest of this file is called into use when replacing an existing
+ but buggy setenv. Known bugs include failure to diagnose invalid
+ name, and consuming a leading '=' from value. */
+#if HAVE_SETENV
+
+# undef setenv
+# if !HAVE_DECL_SETENV
+extern int setenv (const char *, const char *, int);
+# endif
+# define STREQ(a, b) (strcmp (a, b) == 0)
+
+int
+rpl_setenv (const char *name, const char *value, int replace)
+{
+ int result;
+ if (!name || !*name || strchr (name, '='))
+ {
+ errno = EINVAL;
+ return -1;
+ }
+ /* Call the real setenv even if replace is 0, in case implementation
+ has underlying data to update, such as when environ changes. */
+ result = setenv (name, value, replace);
+ if (result == 0 && replace && *value == '=')
+ {
+ char *tmp = getenv (name);
+ if (!STREQ (tmp, value))
+ {
+ int saved_errno;
+ size_t len = strlen (value);
+ tmp = malloca (len + 2);
+ /* Since leading '=' is eaten, double it up. */
+ *tmp = '=';
+ memcpy (tmp + 1, value, len + 1);
+ result = setenv (name, tmp, replace);
+ saved_errno = errno;
+ freea (tmp);
+ errno = saved_errno;
+ }
+ }
+ return result;
+}
+
+#endif /* HAVE_SETENV */
diff --git a/gdb/gnulib/import/unsetenv.c b/gdb/gnulib/import/unsetenv.c
new file mode 100644
index 0000000..8368744
--- /dev/null
+++ b/gdb/gnulib/import/unsetenv.c
@@ -0,0 +1,127 @@
+/* Copyright (C) 1992, 1995-2002, 2005-2016 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
+
+/* Don't use __attribute__ __nonnull__ in this compilation unit. Otherwise gcc
+ optimizes away the name == NULL test below. */
+#define _GL_ARG_NONNULL(params)
+
+#include <config.h>
+
+/* Specification. */
+#include <stdlib.h>
+
+#include <errno.h>
+#if !_LIBC
+# define __set_errno(ev) ((errno) = (ev))
+#endif
+
+#include <string.h>
+#include <unistd.h>
+
+#if !_LIBC
+# define __environ environ
+#endif
+
+#if _LIBC
+/* This lock protects against simultaneous modifications of 'environ'. */
+# include <bits/libc-lock.h>
+__libc_lock_define_initialized (static, envlock)
+# define LOCK __libc_lock_lock (envlock)
+# define UNLOCK __libc_lock_unlock (envlock)
+#else
+# define LOCK
+# define UNLOCK
+#endif
+
+/* In the GNU C library we must keep the namespace clean. */
+#ifdef _LIBC
+# define unsetenv __unsetenv
+#endif
+
+#if _LIBC || !HAVE_UNSETENV
+
+int
+unsetenv (const char *name)
+{
+ size_t len;
+ char **ep;
+
+ if (name == NULL || *name == '\0' || strchr (name, '=') != NULL)
+ {
+ __set_errno (EINVAL);
+ return -1;
+ }
+
+ len = strlen (name);
+
+ LOCK;
+
+ ep = __environ;
+ while (*ep != NULL)
+ if (!strncmp (*ep, name, len) && (*ep)[len] == '=')
+ {
+ /* Found it. Remove this pointer by moving later ones back. */
+ char **dp = ep;
+
+ do
+ dp[0] = dp[1];
+ while (*dp++);
+ /* Continue the loop in case NAME appears again. */
+ }
+ else
+ ++ep;
+
+ UNLOCK;
+
+ return 0;
+}
+
+#ifdef _LIBC
+# undef unsetenv
+weak_alias (__unsetenv, unsetenv)
+#endif
+
+#else /* HAVE_UNSETENV */
+
+# undef unsetenv
+# if !HAVE_DECL_UNSETENV
+# if VOID_UNSETENV
+extern void unsetenv (const char *);
+# else
+extern int unsetenv (const char *);
+# endif
+# endif
+
+/* Call the underlying unsetenv, in case there is hidden bookkeeping
+ that needs updating beyond just modifying environ. */
+int
+rpl_unsetenv (const char *name)
+{
+ int result = 0;
+ if (!name || !*name || strchr (name, '='))
+ {
+ errno = EINVAL;
+ return -1;
+ }
+ while (getenv (name))
+# if !VOID_UNSETENV
+ result =
+# endif
+ unsetenv (name);
+ return result;
+}
+
+#endif /* HAVE_UNSETENV */
diff --git a/gdb/gnulib/update-gnulib.sh b/gdb/gnulib/update-gnulib.sh
index 19d949b..2775dc7 100755
--- a/gdb/gnulib/update-gnulib.sh
+++ b/gdb/gnulib/update-gnulib.sh
@@ -46,12 +46,14 @@ IMPORTED_GNULIB_MODULES="\
rawmemchr \
readlink \
rename \
+ setenv \
signal-h \
strchrnul \
strstr \
strtok_r \
sys_stat \
unistd \
+ unsetenv \
update-copyright \
wchar \
wctype-h \
--
2.8.3