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| author | Richard Maw <richard.maw@codethink.co.uk> | 2012-01-17 14:43:55 +0000 |
|---|---|---|
| committer | Richard Maw <richard.maw@codethink.co.uk> | 2012-01-17 14:43:55 +0000 |
| commit | 2de9abc5c9d40b3c716307d67d16146f823fd554 (patch) | |
| tree | 6979db67934ddc8b564150b465846a383b428ff8 /m4/environ.m4 | |
| parent | 33cc1c6fda6e72a7bae1401e9b2cec495a4d3ff1 (diff) | |
| download | patch-baserock/bootstrap-pass2.tar.gz | |
add the output of bootstrapbaserock/bootstrap-pass2baserock/bootstrap
Diffstat (limited to 'm4/environ.m4')
| -rw-r--r-- | m4/environ.m4 | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/m4/environ.m4 b/m4/environ.m4 new file mode 100644 index 0000000..6c7982f --- /dev/null +++ b/m4/environ.m4 @@ -0,0 +1,47 @@ +# environ.m4 serial 6 +dnl Copyright (C) 2001-2004, 2006-2011 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_MSG_CHECKING([if $2 is properly declared]) + AC_CACHE_VAL([gt_cv_var], [ + AC_COMPILE_IFELSE( + [AC_LANG_PROGRAM( + [[$1 + extern struct { int foo; } $2;]], + [[$2.foo = 1;]])], + [gt_cv_var=no], + [gt_cv_var=yes])]) + AC_MSG_RESULT([$gt_cv_var]) + 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]) +]) |
