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annotate m4/secure_getenv.m4 @ 40196:e63f5d3edab5

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relocatable-prog: Update documentation. * doc/relocatable-maint.texi (Supporting Relocation): Update to match the recent changes.
author Bruno Haible <bruno@clisp.org>
date Sun, 24 Feb 2019 01:49:15 +0100
parents b06060465f09
children
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1 # Look up an environment variable more securely.
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2 dnl Copyright 2013-2019 Free Software Foundation, Inc.
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3 dnl This file is free software; the Free Software Foundation
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4 dnl gives unlimited permission to copy and/or distribute it,
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5 dnl with or without modifications, as long as this notice is preserved.
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6
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7 AC_DEFUN([gl_FUNC_SECURE_GETENV],
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8 [
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9 dnl Persuade glibc <stdlib.h> to declare secure_getenv().
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10 AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
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11
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12 AC_REQUIRE([gl_STDLIB_H_DEFAULTS])
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13 AC_CHECK_FUNCS_ONCE([secure_getenv])
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14 if test $ac_cv_func_secure_getenv = no; then
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15 HAVE_SECURE_GETENV=0
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16 fi
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17 ])
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18
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19 # Prerequisites of lib/secure_getenv.c.
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20 AC_DEFUN([gl_PREREQ_SECURE_GETENV], [
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21 AC_CHECK_FUNCS([__secure_getenv])
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22 if test $ac_cv_func___secure_getenv = no; then
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23 AC_CHECK_FUNCS([issetugid])
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24 fi
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25 AC_CHECK_FUNCS_ONCE([getuid geteuid getgid getegid])
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26 ])