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Diffstat (limited to 'build-aux/alloca.m4')
| -rw-r--r-- | build-aux/alloca.m4 | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/build-aux/alloca.m4 b/build-aux/alloca.m4 new file mode 100644 index 0000000..a9e3f45 --- /dev/null +++ b/build-aux/alloca.m4 @@ -0,0 +1,42 @@ +# alloca.m4 serial 5 +dnl Copyright (C) 2002, 2003, 2004 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([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_EGREP_CPP([Need own alloca], [ +#if defined __GNUC__ || defined _AIX || defined _MSC_VER + Need own alloca +#endif + ], + [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], + [ALLOCA_H=]) + else + ALLOCA_H=alloca.h + fi + AC_SUBST([ALLOCA_H]) + + AC_DEFINE(HAVE_ALLOCA_H, 1, + [Define HAVE_ALLOCA_H for backward compatibility with older code + that includes <alloca.h> only if HAVE_ALLOCA_H is defined.]) +]) + +# Prerequisites of lib/alloca.c. +# STACK_DIRECTION is already handled by AC_FUNC_ALLOCA. +AC_DEFUN([gl_PREREQ_ALLOCA], [:]) |