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https://github.com/moparisthebest/curl
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bc5298e25c
Provide a 'traceable' AC_CONFIG_MACRO_DIR definition only when using an autoconf version that does not provide it, instead of what we were doing up to now of providing and overriding AC_CONFIG_MACRO_DIR for all autoconf versions.
101 lines
2.7 KiB
Plaintext
101 lines
2.7 KiB
Plaintext
#***************************************************************************
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#***************************************************************************
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# File version for 'aclocal' use. Keep it a single number.
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# serial 6
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dnl CURL_OVERRIDE_AUTOCONF
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dnl -------------------------------------------------
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dnl Placing a call to this macro in configure.ac after
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dnl the one to AC_INIT will make macros in this file
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dnl visible to the rest of the compilation overriding
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dnl those from Autoconf.
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AC_DEFUN([CURL_OVERRIDE_AUTOCONF], [
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AC_BEFORE([$0],[AC_PROG_LIBTOOL])
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# using curl-override.m4
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])
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dnl Override Autoconf's AC_LANG_PROGRAM (C)
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dnl -------------------------------------------------
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dnl This is done to prevent compiler warning
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dnl 'function declaration isn't a prototype'
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dnl in function main. This requires at least
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dnl a c89 compiler and does not suport K&R.
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m4_define([AC_LANG_PROGRAM(C)],
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[$1
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int main (void)
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{
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$2
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;
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return 0;
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}])
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dnl Override Autoconf's AC_LANG_CALL (C)
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dnl -------------------------------------------------
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dnl This is a backport of Autoconf's 2.60 with the
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dnl embedded comments that hit the resulting script
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dnl removed. This is done to reduce configure size
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dnl and use fixed macro across Autoconf versions.
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m4_define([AC_LANG_CALL(C)],
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[AC_LANG_PROGRAM([$1
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m4_if([$2], [main], ,
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[
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#ifdef __cplusplus
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extern "C"
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#endif
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char $2 ();])], [return $2 ();])])
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dnl Override Autoconf's AC_LANG_FUNC_LINK_TRY (C)
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dnl -------------------------------------------------
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dnl This is a backport of Autoconf's 2.60 with the
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dnl embedded comments that hit the resulting script
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dnl removed. This is done to reduce configure size
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dnl and use fixed macro across Autoconf versions.
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m4_define([AC_LANG_FUNC_LINK_TRY(C)],
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[AC_LANG_PROGRAM(
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[
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#define $1 innocuous_$1
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#ifdef __STDC__
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# include <limits.h>
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#else
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# include <assert.h>
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#endif
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#undef $1
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#ifdef __cplusplus
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extern "C"
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#endif
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char $1 ();
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#if defined __stub_$1 || defined __stub___$1
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choke me
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#endif
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], [return $1 ();])])
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dnl Override Autoconf's PATH_SEPARATOR check
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dnl -------------------------------------------------
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dnl This is done to ensure that the same check is
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dnl used across different Autoconf versions and to
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dnl allow us to use this macro early enough in the
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dnl configure script.
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m4_defun([_AS_PATH_SEPARATOR_PREPARE],
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[CURL_CHECK_PATH_SEPARATOR
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m4_define([$0],[])])
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m4_defun([_LT_AC_LIBTOOL_SYS_PATH_SEPARATOR],
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[CURL_CHECK_PATH_SEPARATOR
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m4_define([$0],[])])
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dnl Provide Autoconf's AC_CONFIG_MACRO_DIR (DIR)
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dnl -------------------------------------------------
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dnl Allow usage of mentioned macro in configure.ac
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dnl even with ancient Autoconf versions, such as 2.57,
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dnl that do not provide a definition for this macro.
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m4_ifndef([AC_CONFIG_MACRO_DIR],
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[AC_DEFUN([AC_CONFIG_MACRO_DIR],[:])])
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