diff options
Diffstat (limited to 'gnulib-m4/setenv.m4')
| -rw-r--r-- | gnulib-m4/setenv.m4 | 127 |
1 files changed, 39 insertions, 88 deletions
diff --git a/gnulib-m4/setenv.m4 b/gnulib-m4/setenv.m4 index 3aa38d89..58f6d138 100644 --- a/gnulib-m4/setenv.m4 +++ b/gnulib-m4/setenv.m4 @@ -1,5 +1,5 @@ -# setenv.m4 serial 26 -dnl Copyright (C) 2001-2004, 2006-2015 Free Software Foundation, Inc. +# setenv.m4 serial 16 +dnl Copyright (C) 2001-2004, 2006-2010 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. @@ -7,7 +7,16 @@ 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 $HAVE_SETENV$REPLACE_SETENV != 10; then + AC_LIBOBJ([setenv]) + fi +]) + +# Like gl_FUNC_SETENV, except prepare for separate compilation (no AC_LIBOBJ). +AC_DEFUN([gl_FUNC_SETENV_SEPARATE], +[ + AC_REQUIRE([gl_STDLIB_H_DEFAULTS]) + AC_CHECK_FUNCS_ONCE([setenv]) if test $ac_cv_func_setenv = no; then HAVE_SETENV=0 else @@ -18,127 +27,69 @@ AC_DEFUN([gl_FUNC_SETENV], #include <errno.h> #include <string.h> ]], [[ - int result = 0; - { - if (setenv ("", "", 0) != -1) - result |= 1; - else if (errno != EINVAL) - result |= 2; - } - { - if (setenv ("a", "=", 1) != 0) - result |= 4; - else if (strcmp (getenv ("a"), "=") != 0) - result |= 8; - } - return result; + if (setenv ("", "", 0) != -1) return 1; + if (errno != EINVAL) return 2; + if (setenv ("a", "=", 1) != 0) return 3; + if (strcmp (getenv ("a"), "=") != 0) return 4; ]])], [gl_cv_func_setenv_works=yes], [gl_cv_func_setenv_works=no], - [case "$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 $ac_cv_have_decl_setenv = no; then - HAVE_DECL_SETENV=0 + [gl_cv_func_setenv_works="guessing no"])]) + if test "$gl_cv_func_setenv_works" != yes; then + REPLACE_SETENV=1 + AC_LIBOBJ([setenv]) + fi 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 + AC_LIBOBJ([unsetenv]) + gl_PREREQ_UNSETENV 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> + [AC_TRY_COMPILE([#include <stdlib.h> extern #ifdef __cplusplus "C" #endif +#if defined(__STDC__) || defined(__cplusplus) int unsetenv (const char *name); - ]], - [[]])], - [gt_cv_func_unsetenv_ret='int'], - [gt_cv_func_unsetenv_ret='void'])]) +#else +int unsetenv(); +#endif +], , gt_cv_func_unsetenv_ret='int', gt_cv_func_unsetenv_ret='void')]) if test $gt_cv_func_unsetenv_ret = 'void'; then AC_DEFINE([VOID_UNSETENV], [1], [Define to 1 if unsetenv returns void instead of int.]) REPLACE_UNSETENV=1 + AC_LIBOBJ([unsetenv]) fi dnl Solaris 10 unsetenv does not remove all copies of a name. - dnl Haiku alpha 2 unsetenv gets confused by assignment to environ. - dnl OpenBSD 4.7 unsetenv("") does not fail. - AC_CACHE_CHECK([whether unsetenv obeys POSIX], + AC_CACHE_CHECK([whether unsetenv works on duplicates], [gl_cv_func_unsetenv_works], [AC_RUN_IFELSE([AC_LANG_PROGRAM([[ #include <stdlib.h> - #include <errno.h> - extern char **environ; ]], [[ - char entry1[] = "a=1"; - char entry2[] = "b=2"; - char *env[] = { entry1, entry2, NULL }; + char entry[] = "b=2"; if (putenv ((char *) "a=1")) return 1; - if (putenv (entry2)) return 2; - entry2[0] = 'a'; + if (putenv (entry)) return 2; + entry[0] = 'a'; unsetenv ("a"); if (getenv ("a")) return 3; - if (!unsetenv ("") || errno != EINVAL) return 4; - entry2[0] = 'b'; - environ = env; - if (!getenv ("a")) return 5; - entry2[0] = 'a'; - unsetenv ("a"); - if (getenv ("a")) return 6; ]])], [gl_cv_func_unsetenv_works=yes], [gl_cv_func_unsetenv_works=no], - [case "$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 "$gl_cv_func_unsetenv_works" in - *yes) ;; - *) - REPLACE_UNSETENV=1 - ;; - esac + [gl_cv_func_unsetenv_works="guessing no"])]) + if test "$gl_cv_func_unsetenv_works" != yes; then + REPLACE_UNSETENV=1 + AC_LIBOBJ([unsetenv]) + fi fi ]) |