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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-15 19:16:34 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-15 19:16:34 +0000 |
commit | a398d2c2b5fd6ab0545d8bb019f9a970b2309404 (patch) | |
tree | 272fc7ab226258d7ceddee12c8c682c8e711c2b0 /m4/environ.m4 | |
parent | Initial commit. (diff) | |
download | parted-upstream.tar.xz parted-upstream.zip |
Adding upstream version 3.6.upstream/3.6upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'm4/environ.m4')
-rw-r--r-- | m4/environ.m4 | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/m4/environ.m4 b/m4/environ.m4 new file mode 100644 index 0000000..741dfc5 --- /dev/null +++ b/m4/environ.m4 @@ -0,0 +1,46 @@ +# environ.m4 serial 8 +dnl Copyright (C) 2001-2004, 2006-2023 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_CACHE_CHECK([if $2 is properly declared], [gt_cv_var], + [AC_COMPILE_IFELSE( + [AC_LANG_PROGRAM( + [[$1 + typedef struct { int foo; } foo_t; + extern foo_t $2;]], + [[$2.foo = 1;]])], + [gt_cv_var=no], + [gt_cv_var=yes])]) + 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]) +]) |