diff options
| author | Ulf Hermann <[email protected]> | 2017-02-23 17:22:41 +0100 |
|---|---|---|
| committer | Ulf Hermann <[email protected]> | 2017-04-27 15:56:33 +0000 |
| commit | 121d248c1da7f2130a2edde6d158f116c89ed407 (patch) | |
| tree | ad7a348a88db648da6e2df366d89fcb7b7436a1c /m4/getprogname.m4 | |
| parent | f10810fff6fda147f9c07fea0e1b33a7c4d79ad1 (diff) | |
Add gnulib modules to replace missing libc functionality
This enables us to build a fully featured elfutils package on systems
with reduced C libraries, such as windows. All the modules are built
into libgnu.a, which is then linked into all binaries if
--enable-gnulib is given on the configure line.
Change-Id: I743fd22172bc85d9f10dcc3dad8eb921f462b554
Reviewed-by: Christian Kandeler <[email protected]>
Diffstat (limited to 'm4/getprogname.m4')
| -rw-r--r-- | m4/getprogname.m4 | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/m4/getprogname.m4 b/m4/getprogname.m4 new file mode 100644 index 00000000..efc06e78 --- /dev/null +++ b/m4/getprogname.m4 @@ -0,0 +1,43 @@ +# getprogname.m4 - check for getprogname or replacements for it + +# Copyright (C) 2016-2017 Free Software Foundation, Inc. +# This file is free software; the Free Software Foundation +# gives unlimited permission to copy and/or distribute it, +# with or without modifications, as long as this notice is preserved. + +# serial 4 + +AC_DEFUN([gl_FUNC_GETPROGNAME], +[ + AC_CHECK_FUNCS_ONCE([getprogname getexecname]) + AC_REQUIRE([gl_USE_SYSTEM_EXTENSIONS]) + ac_found=0 + AC_CHECK_DECLS([program_invocation_name], [ac_found=1], [], + [#include <errno.h>]) + AC_CHECK_DECLS([program_invocation_short_name], [ac_found=1], [], + [#include <errno.h>]) + AC_CHECK_DECLS([__argv], [ac_found=1], [], [#include <stdlib.h>]) + + # Incur the cost of this test only if none of the above worked. + if test $ac_found = 0; then + # On OpenBSD 5.1, using the global __progname variable appears to be + # the only way to implement getprogname. + AC_CACHE_CHECK([whether __progname is defined in default libraries], + [gl_cv_var___progname], + [ + gl_cv_var___progname= + AC_LINK_IFELSE( + [AC_LANG_PROGRAM( + [[extern char *__progname;]], + [[return *__progname;]] + )], + [gl_cv_var___progname=yes] + ) + ] + ) + if test "$gl_cv_var___progname" = yes; then + AC_DEFINE([HAVE_VAR___PROGNAME], 1, + [Define if you have a global __progname variable]) + fi + fi +]) |