HCoop / bpt / guile.git / blame
| Commit | Line | Data |
|---|---|---|
| 5e69ceb7 MW |
1 | # putenv.m4 serial 20 |
| 2 | dnl Copyright (C) 2002-2014 Free Software Foundation, Inc. | |
| f240aacb LC |
3 | dnl This file is free software; the Free Software Foundation |
| 4 | dnl gives unlimited permission to copy and/or distribute it, | |
| 5 | dnl with or without modifications, as long as this notice is preserved. | |
| 6 | ||
| 7 | dnl From Jim Meyering. | |
| 8 | dnl | |
| 9 | dnl Check whether putenv ("FOO") removes FOO from the environment. | |
| 10 | dnl The putenv in libc on at least SunOS 4.1.4 does *not* do that. | |
| 11 | ||
| 12 | AC_DEFUN([gl_FUNC_PUTENV], | |
| 13 | [ | |
| 14 | AC_REQUIRE([gl_STDLIB_H_DEFAULTS]) | |
| 005de2e8 | 15 | AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles |
| f240aacb LC |
16 | AC_CACHE_CHECK([for putenv compatible with GNU and SVID], |
| 17 | [gl_cv_func_svid_putenv], | |
| 18 | [AC_RUN_IFELSE([AC_LANG_PROGRAM([AC_INCLUDES_DEFAULT],[[ | |
| 19 | /* Put it in env. */ | |
| 20 | if (putenv ("CONFTEST_putenv=val")) | |
| 21 | return 1; | |
| 22 | ||
| 23 | /* Try to remove it. */ | |
| 24 | if (putenv ("CONFTEST_putenv")) | |
| 0f00f2c3 | 25 | return 2; |
| f240aacb LC |
26 | |
| 27 | /* Make sure it was deleted. */ | |
| 28 | if (getenv ("CONFTEST_putenv") != 0) | |
| 0f00f2c3 | 29 | return 3; |
| f240aacb LC |
30 | |
| 31 | return 0; | |
| 1cd4fffc LC |
32 | ]])], |
| 33 | gl_cv_func_svid_putenv=yes, | |
| 34 | gl_cv_func_svid_putenv=no, | |
| 35 | dnl When crosscompiling, assume putenv is broken. | |
| 005de2e8 LC |
36 | [case "$host_os" in |
| 37 | # Guess yes on glibc systems. | |
| 38 | *-gnu*) gl_cv_func_svid_putenv="guessing yes" ;; | |
| 39 | # If we don't know, assume the worst. | |
| 40 | *) gl_cv_func_svid_putenv="guessing no" ;; | |
| 41 | esac | |
| 42 | ]) | |
| f240aacb | 43 | ]) |
| 005de2e8 LC |
44 | case "$gl_cv_func_svid_putenv" in |
| 45 | *yes) ;; | |
| 46 | *) | |
| 47 | REPLACE_PUTENV=1 | |
| 48 | ;; | |
| 49 | esac | |
| f240aacb | 50 | ]) |
| af07e104 AW |
51 | |
| 52 | # Prerequisites of lib/putenv.c. | |
| 53 | AC_DEFUN([gl_PREREQ_PUTENV], | |
| 54 | [ | |
| 5e69ceb7 | 55 | AC_CHECK_DECLS([_putenv]) |
| af07e104 | 56 | ]) |