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clamav/libclamav/c++/m4/check_gnu_make.m4
Török Edvin 2c7d5adc15 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

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#
# Check for GNU Make. This is originally from
# http://www.gnu.org/software/ac-archive/htmldoc/check_gnu_make.html
#
AC_DEFUN([AC_CHECK_GNU_MAKE],
[AC_CACHE_CHECK([for GNU make],[llvm_cv_gnu_make_command],
dnl Search all the common names for GNU make
[llvm_cv_gnu_make_command=''
for a in "$MAKE" make gmake gnumake ; do
if test -z "$a" ; then continue ; fi ;
if ( sh -c "$a --version" 2> /dev/null | grep GNU 2>&1 > /dev/null )
then
llvm_cv_gnu_make_command=$a ;
break;
fi
done])
dnl If there was a GNU version, then set @ifGNUmake@ to the empty string,
dnl '#' otherwise
if test "x$llvm_cv_gnu_make_command" != "x" ; then
ifGNUmake='' ;
else
ifGNUmake='#' ;
AC_MSG_RESULT("Not found");
fi
AC_SUBST(ifGNUmake)
])