build: Use AX_CC_FOR_BUILD and EXEEXT.
* configure.ac (AX_CC_FOR_BUILD): New. * doc/Makefile.am: Use EXEEXT and EXEEXT_FOR_BUILD. * m4/ac_prog_cc_for_build.m4: Remove. * m4/ax_cc_for_build.m4: New.
<michael.haubenwallner@ssi-schaefer.com>
- Suggested-by: Michael Haubenwallner
- Fixes-commit: 6eb80abcde5ad776379069871e4156b28ef69712
- Signed-off-by: NIIBE Yutaka <gniibe@fsij.org>