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author | Richard Maw <richard.maw@codethink.co.uk> | 2012-01-11 10:45:00 +0000 |
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committer | Richard Maw <richard.maw@codethink.co.uk> | 2012-01-11 10:45:00 +0000 |
commit | 24d1733e78a17d71aea6912144394ed7d3a82d50 (patch) | |
tree | 069608d934a8716d55a94c62c4bd75c1152f868c /ltdl/m4/alloca.m4 | |
parent | d7b9fe130c2305d44fa1023283d3c2fcd389ba93 (diff) | |
download | m4-24d1733e78a17d71aea6912144394ed7d3a82d50.tar.gz |
remove .gitignores and add the rest of the files
Diffstat (limited to 'ltdl/m4/alloca.m4')
-rwxr-xr-x | ltdl/m4/alloca.m4 | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/ltdl/m4/alloca.m4 b/ltdl/m4/alloca.m4 new file mode 100755 index 00000000..f3ee3438 --- /dev/null +++ b/ltdl/m4/alloca.m4 @@ -0,0 +1,47 @@ +# alloca.m4 serial 9 +dnl Copyright (C) 2002-2004, 2006-2007, 2009-2010 Free Software Foundation, +dnl 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([gl_FUNC_ALLOCA], +[ + dnl Work around a bug of AC_EGREP_CPP in autoconf-2.57. + AC_REQUIRE([AC_PROG_CPP]) + AC_REQUIRE([AC_PROG_EGREP]) + + AC_REQUIRE([AC_FUNC_ALLOCA]) + if test $ac_cv_func_alloca_works = no; then + gl_PREREQ_ALLOCA + fi + + # Define an additional variable used in the Makefile substitution. + if test $ac_cv_working_alloca_h = yes; then + AC_CACHE_CHECK([for alloca as a compiler built-in], [gl_cv_rpl_alloca], [ + AC_EGREP_CPP([Need own alloca], [ +#if defined __GNUC__ || defined _AIX || defined _MSC_VER + Need own alloca +#endif + ], [gl_cv_rpl_alloca=yes], [gl_cv_rpl_alloca=no]) + ]) + if test $gl_cv_rpl_alloca = yes; then + dnl OK, alloca can be implemented through a compiler built-in. + AC_DEFINE([HAVE_ALLOCA], [1], + [Define to 1 if you have 'alloca' after including <alloca.h>, + a header that may be supplied by this distribution.]) + ALLOCA_H=alloca.h + else + dnl alloca exists as a library function, i.e. it is slow and probably + dnl a memory leak. Don't define HAVE_ALLOCA in this case. + ALLOCA_H= + fi + else + ALLOCA_H=alloca.h + fi + AC_SUBST([ALLOCA_H]) +]) + +# Prerequisites of lib/alloca.c. +# STACK_DIRECTION is already handled by AC_FUNC_ALLOCA. +AC_DEFUN([gl_PREREQ_ALLOCA], [:]) |