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Diffstat (limited to 'm4/malloc_h.m4')
| -rw-r--r-- | m4/malloc_h.m4 | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/m4/malloc_h.m4 b/m4/malloc_h.m4 new file mode 100644 index 0000000000..f8cd17018b --- /dev/null +++ b/m4/malloc_h.m4 @@ -0,0 +1,47 @@ +# malloc_h.m4 serial 1 +dnl Copyright (C) 2020 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. + +dnl Written by Bruno Haible. + +AC_DEFUN([gl_MALLOC_H], +[ + dnl Use AC_REQUIRE here, so that the default behavior below is expanded + dnl once only, before all statements that occur in other macros. + AC_REQUIRE([gl_MALLOC_H_DEFAULTS]) + + gl_CHECK_NEXT_HEADERS([malloc.h]) + if test $ac_cv_header_malloc_h = yes; then + HAVE_MALLOC_H=1 + else + HAVE_MALLOC_H=0 + fi + AC_SUBST([HAVE_MALLOC_H]) + + dnl Check for declarations of anything we want to poison if the + dnl corresponding gnulib module is not in use. + gl_WARN_ON_USE_PREPARE([[ +#if HAVE_MALLOC_H +# include <malloc.h> +#endif + ]], [memalign]) +]) + +AC_DEFUN([gl_MALLOC_MODULE_INDICATOR], +[ + dnl Use AC_REQUIRE here, so that the default settings are expanded once only. + AC_REQUIRE([gl_MALLOC_H_DEFAULTS]) + gl_MODULE_INDICATOR_SET_VARIABLE([$1]) + dnl Define it also as a C macro, for the benefit of the unit tests. + gl_MODULE_INDICATOR_FOR_TESTS([$1]) +]) + +AC_DEFUN([gl_MALLOC_H_DEFAULTS], +[ + GNULIB_MEMALIGN=0; AC_SUBST([GNULIB_MEMALIGN]) + dnl Assume proper GNU behavior unless another module says otherwise. + HAVE_MEMALIGN=1; AC_SUBST([HAVE_MEMALIGN]) + REPLACE_MEMALIGN=0; AC_SUBST([REPLACE_MEMALIGN]) +]) |