72 lines
1.7 KiB
Plaintext
Executable File
72 lines
1.7 KiB
Plaintext
Executable File
# setenv.m4 serial 11
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dnl Copyright (C) 2001-2004, 2006-2009 Free Software Foundation, Inc.
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dnl This file is free software; the Free Software Foundation
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dnl gives unlimited permission to copy and/or distribute it,
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dnl with or without modifications, as long as this notice is preserved.
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AC_DEFUN([gl_FUNC_SETENV],
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[
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AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
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AC_CHECK_FUNCS_ONCE([setenv])
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if test $ac_cv_func_setenv = no; then
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HAVE_SETENV=0
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AC_LIBOBJ([setenv])
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gl_PREREQ_SETENV
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fi
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])
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# Like gl_FUNC_SETENV, except prepare for separate compilation (no AC_LIBOBJ).
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AC_DEFUN([gl_FUNC_SETENV_SEPARATE],
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[
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AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
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AC_CHECK_FUNCS_ONCE([setenv])
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if test $ac_cv_func_setenv = no; then
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HAVE_SETENV=0
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fi
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gl_PREREQ_SETENV
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])
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AC_DEFUN([gl_FUNC_UNSETENV],
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[
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AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
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AC_CHECK_FUNCS([unsetenv])
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if test $ac_cv_func_unsetenv = no; then
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HAVE_UNSETENV=0
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AC_LIBOBJ([unsetenv])
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gl_PREREQ_UNSETENV
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else
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AC_CACHE_CHECK([for unsetenv() return type], [gt_cv_func_unsetenv_ret],
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[AC_TRY_COMPILE([#include <stdlib.h>
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extern
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#ifdef __cplusplus
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"C"
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#endif
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#if defined(__STDC__) || defined(__cplusplus)
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int unsetenv (const char *name);
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#else
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int unsetenv();
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#endif
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], , gt_cv_func_unsetenv_ret='int', gt_cv_func_unsetenv_ret='void')])
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if test $gt_cv_func_unsetenv_ret = 'void'; then
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VOID_UNSETENV=1
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fi
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fi
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])
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# Prerequisites of lib/setenv.c.
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AC_DEFUN([gl_PREREQ_SETENV],
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[
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AC_REQUIRE([AC_FUNC_ALLOCA])
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AC_REQUIRE([gl_ENVIRON])
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AC_CHECK_HEADERS_ONCE([unistd.h])
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AC_CHECK_HEADERS([search.h])
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AC_CHECK_FUNCS([tsearch])
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])
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# Prerequisites of lib/unsetenv.c.
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AC_DEFUN([gl_PREREQ_UNSETENV],
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[
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AC_REQUIRE([gl_ENVIRON])
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AC_CHECK_HEADERS_ONCE([unistd.h])
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])
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