clamav/m4/llvm.m4

AC_DEFUN_ONCE([AC_CONFIG_SUBDIRS_OPTIONAL],
[
AC_REQUIRE([AC_CONFIG_SUBDIRS])
subdirfailed=no
AC_CONFIG_SUBDIRS([$1])
m4_define([_AC_OUTPUT_SUBDIRS],
	  [
       	  m4_pushdef([AC_MSG_ERROR],[subdirfailed=yes])
	  ]m4_defn([_AC_OUTPUT_SUBDIRS])[
	  m4_popdef([AC_MSG_ERROR])])
])
If C++ compiler is not available, don't build LLVM. This is tricky, because autoconf provides no way to do this automatically (AC_PROG_CXX fails if no C++ compiler). One could override AC_MSG_ERROR/FAILURE for AC_PROG_CXX, but that causes all sorts of problems later (like sys/types.h not found). So instead create yet another configure in libclamav/c++, but teach autoconf not to fail if the subconfigure fails (by overriding AC_MSG_ERROR to set a variable instead of exiting). This seems to work with shared and static builds, "-all-static" builds don't work yet, will fix that later. 2009-08-31 15:49:41 +03:00			`AC_DEFUN_ONCE([AC_CONFIG_SUBDIRS_OPTIONAL],`
			`[`
			`AC_REQUIRE([AC_CONFIG_SUBDIRS])`
			`subdirfailed=no`
			`AC_CONFIG_SUBDIRS([$1])`
			`m4_define([_AC_OUTPUT_SUBDIRS],`
			`[`
			`m4_pushdef([AC_MSG_ERROR],[subdirfailed=yes])`
			`]m4_defn([_AC_OUTPUT_SUBDIRS])[`
			`m4_popdef([AC_MSG_ERROR])])`
Add llvm autoconf glue. 2009-08-24 19:39:25 +03:00			`])`