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dnl Process this file with autoconf to produce a configure script.
AC_INIT(cccp.c)
dnl Specify the autoconf file.
AC_CONFIG_HEADER(autoconfig.h)
dnl Check if we are forced to use the cxref-cpp
WITH_CXREF_CPP=test
AC_ARG_WITH(cxref-cpp,
[ --with-cxref-cpp use the supplied cpp instead of trying to use gcc],
[if test "$withval" = "yes"; then WITH_CXREF_CPP=yes; fi
if test "$withval" = "no"; then WITH_CXREF_CPP=no; fi])
dnl Checks for programs.
AC_PROG_CC
AC_PROG_YACC
AC_PROG_CPP
AC_PROG_INSTALL
AC_PROG_LN_S
AC_PROG_MAKE_SET
AC_PROG_EGREP
dnl Checks for libraries.
dnl Checks for header files.
AC_HEADER_STDC
AC_HEADER_TIME
AC_CHECK_HEADERS(fcntl.h locale.h stdlib.h string.h strings.h time.h unistd.h)
AC_CHECK_HEADERS(sys/param.h sys/stat.h sys/time.h sys/wait.h)
dnl Checks for typedefs, structures, and compiler characteristics.
AC_C_CONST
AC_STRUCT_TM
AC_CHECK_SIZEOF(int)
AC_CHECK_SIZEOF(long)
AC_CHECK_SIZEOF(long long)
dnl Checks for library functions.
AC_CHECK_FUNCS(bcmp bcopy bzero index rindex strerror strsignal)
dnl Check the gcc version
if test ! "x$GCC" = "x" ; then
AC_MSG_CHECKING([if installed gcc is new enough to use instead of cxref-cpp])
AC_TRY_RUN([
int main()
{
#if defined(__GNUC__) && ( ( __GNUC__==2 && __GNUC_MINOR__>=8 ) || __GNUC__>=3 )
exit(0);
#else
exit(1);
#endif
}
],
[newGCC=yes])
if test "$WITH_CXREF_CPP" = "no" ; then
if test "x$newGCC" = "x" ; then
AC_MSG_RESULT([no])
AC_MSG_ERROR([the '--without-cxref-cpp' option was used but gcc is not suitable])
else
AC_MSG_RESULT([yes, ignoring further checks due to '--without-cxref-cpp' option])
fi
elif test "x$newGCC" = "x" || test "$WITH_CXREF_CPP" = "yes" ; then
if test "x$newGCC" = "x" ; then
AC_MSG_RESULT([no, using cxref-cpp])
else
AC_MSG_RESULT([yes, but '--with-cxref-cpp' option overrides this])
fi
CXREF_CPP=cxref-cpp
else
AC_MSG_RESULT(yes)
AC_MSG_CHECKING([if installed gcc preserves comments after define statements])
echo "#define foo bar /* FIND-ME */" | $CC -E -C - > ./conftest.gcc
if $EGREP -e FIND-ME ./conftest.gcc > /dev/null 2>&1 ; then
AC_MSG_RESULT(yes)
else
AC_MSG_RESULT([no, using cxref-cpp])
CXREF_CPP=cxref-cpp
fi
rm ./conftest.gcc
AC_MSG_CHECKING([if installed gcc preserves comments after include statements])
touch conftest.h
echo "#include \"conftest.h\" /* FIND-ME */" | $CC -E -C - > ./conftest.gcc
if $EGREP -e FIND-ME ./conftest.gcc > /dev/null 2>&1 ; then
AC_MSG_RESULT(yes)
else
AC_MSG_RESULT([no, using cxref-cpp])
CXREF_CPP=cxref-cpp
fi
rm ./conftest.h ./conftest.gcc
fi
else
AC_MSG_WARN(-----------------------------------------------------)
AC_MSG_WARN(The C compiler is not gcc, you may have problems! )
AC_MSG_WARN(read the file cpp/README and cpp/cxref-cpp-configure.)
AC_MSG_WARN(-----------------------------------------------------)
CXREF_CPP=cxref-cpp
fi
AC_SUBST(CXREF_CPP)
AC_SUBST(GCC)
dnl Create the output files.
AC_OUTPUT(Makefile)
AC_OUTPUT(cxref-cpp-configure)
chmod 755 cxref-cpp-configure
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