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dnl TEST_APACHE_VERSION(RELEASE, [MINIMUM-VERSION [, ACTION-IF-FOUND [, ACTION-IF-NOT-FOUND]]])
dnl Test for Apache
dnl
AC_DEFUN(TEST_APACHE_VERSION,
[dnl
	AC_REQUIRE([AC_CANONICAL_TARGET])
	releasetest=$1
	min_apache_version="$2"
	no_apache=""
	ac_save_CFLAGS="$CFLAGS"
	CFLAGS="$CFLAGS $APACHE_CFLAGS"
	if test $releasetest -eq 20; then
		CFLAGS="$CFLAGS -I$APU_INCDIR -I$APR_INCDIR"
	fi

	AC_TRY_RUN([
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "httpd.h"

#ifndef AP_SERVER_BASEREVISION
	#define AP_SERVER_BASEREVISION SERVER_BASEREVISION
#endif

char* my_strdup (char *str)
{
	char *new_str;

	if (str) {
		new_str = (char *)malloc ((strlen (str) + 1) * sizeof(char));
		strcpy (new_str, str);
	} else
		new_str = NULL;

	return new_str;
}

int main (int argc, char *argv[])
{
	int major1, minor1, micro1;
	int major2, minor2, micro2;
	char *tmp_version;

	{ FILE *fp = fopen("conf.apachetest", "a"); if ( fp ) fclose(fp); }

	tmp_version = my_strdup("$min_apache_version");
	if (sscanf(tmp_version, "%d.%d.%d", &major1, &minor1, &micro1) != 3) {
		printf("%s, bad version string\n", "$min_apache_version");
		exit(1);
	}
	tmp_version = my_strdup(AP_SERVER_BASEREVISION);
	if (sscanf(tmp_version, "%d.%d.%d", &major2, &minor2, &micro2) != 3) {
		printf("%s, bad version string\n", AP_SERVER_BASEREVISION);
		exit(1);
	}
	if ((major2 > major1) ||
		((major2 == major1) && (minor2 > minor1)) ||
		((major2 == major1) && (minor2 == minor1) && (micro2 >= micro1)))
	{
		exit(0);
	} else {
		/*printf("\n*** This module requires apache version %d.%d.%d or greater\n",
			major1, minor1, micro1);
		printf("*** I found version %d.%d.%d. Please verify the installation directory\n",
			major2, minor2, micro2);
		printf("*** of apache with the --with-apxs configure option.\n");*/
		exit(1);
	}
}

],, no_apache=yes,[echo $ac_n "cross compiling; assumed OK... $ac_c"])
	CFLAGS="$ac_save_CFLAGS"

	if test "x$no_apache" = x ; then
		ifelse([$3], , :, [$3])
   	else
		if test -f conf.apachetest ; then
			:
		else
			echo "*** Could not run Apache test program, checking why..."
			CFLAGS="$CFLAGS APACHE_CFLAGS"
			AC_TRY_LINK([
#include <stdio.h>
#include "httpd.h"

int main(int argc, char *argv[])
{ return 0; }
#undef main
#define main K_and_R_C_main
],				[ return 0; ],
				[ echo "*** The test program compiled, but failed to run. Check config.log" ],
				[ echo "*** The test program failed to compile or link. Check config.log" ])
			CFLAGS="$ac_save_CFLAGS"
		fi
	 	ifelse([$4], , :, [$4])
  	fi
  	rm -f conf.apachetest
])

dnl CHECK_PATH_APACHE([MINIMUM13-VERSION [, MINIMUM20-VERSION [,
dnl			ACTION-IF-FOUND13 [, ACTION-IF-FOUND20 [, ACTION-IF-NOT-FOUND]]])
dnl Test for Apache apxs
dnl
AC_DEFUN(CHECK_PATH_APACHE,
[dnl
AC_ARG_WITH(
		apxs,
		[AC_HELP_STRING([--with-apxs=PATH],[Location to APXS binary (default: /usr)])],
		apxs_prefix="$withval",
		apxs_prefix="/usr"
	)
AC_ARG_ENABLE(
		apachetest,
		[AC_HELP_STRING([--disable-apachetest],[Do not try to compile and run apache version test program])],
		,
		enable_apachetest=yes
	)

	PATH="$apxs_prefix:$apxs_prefix/bin:$apxs_prefix/sbin:$PATH"
	if test -x $apxs_prefix -a ! -d $apxs_prefix; then
		APXS_BIN=$apxs_prefix
	else
		AC_PATH_PROG(APXS_BIN, apxs, no, [$PATH])
	fi
	min_apache13_version=ifelse([$1], ,no,$1)
	min_apache20_version=ifelse([$2], ,no,$2)
	no_apxs=""
	if test "$APXS_BIN" = "no"; then
		AC_MSG_ERROR([*** The apxs binary installed by apache could not be found!])
		AC_MSG_ERROR([*** If apache is installed in PREFIX, make sure PREFIX/bin is in])
		AC_MSG_ERROR([*** your path, or use the --with-apxs configure option])
	else
		APACHE_INCDIR=`$APXS_BIN -q INCLUDEDIR`
		APR_INCDIR=`$APXS_BIN -q APR_INCLUDEDIR`
		APU_INCDIR=`$APXS_BIN -q APU_INCLUDEDIR`
		APACHE_CPPFLAGS=`$APXS_BIN -q CPPFLAGS`
		APACHE_CPPFLAGS="$APACHE_CPPFLAGS -I$APACHE_INCDIR"
		APACHE_CFLAGS=`$APXS_BIN -q CFLAGS`
		APACHE_CFLAGS="$APACHE_CFLAGS -I$APACHE_INCDIR"
		APACHE_MODDIR=`$APXS_BIN -q LIBEXECDIR`

		if test "x$enable_apachetest" = "xyes" ; then
			if test "$min_apache20_version" != "no"; then
				AC_MSG_CHECKING(for Apache 2.0 version >= $min_apache20_version)
				TEST_APACHE_VERSION(20,$min_apache20_version,
					AC_MSG_RESULT(yes)
					AC_DEFINE(WITH_APACHE20,1,[Define to 1 if we are compiling with Apache 2.0.x])
					APACHE_VERSION="2.0"
			        APXS_EXTENSION=.la
					APACHE_CFLAGS="$APACHE_CFLAGS -I$APU_INCDIR -I$APR_INCDIR"
					APACHE_CPPFLAGS="$APACHE_CPPFLAGS -I$APU_INCDIR -I$APR_INCDIR"
					APACHE_DEFS="-DWITH_APACHE20"
					ifelse([$4], , , $4),
					AC_MSG_RESULT(no)
					if test "x$min_apache13_version" = "xno"; then
						ifelse([$5], , , $5)
					fi
					)
			fi
			if test "$min_apache13_version" != "no" -a "x$APACHE_VERSION" = "x"; then
				AC_MSG_CHECKING(for Apache 1.3 version >= $min_apache13_version)
				TEST_APACHE_VERSION(13,$min_apache13_version,
					AC_MSG_RESULT(yes)
					AC_DEFINE(WITH_APACHE13,1,[Define to 1 if we are compiling with Apache 1.3.x])
					APACHE_VERSION="1.3"
					APXS_EXTENSION=.so
					APACHE_CFLAGS="-g $APACHE_CFLAGS"
					APACHE_DEFS="-DWITH_APACHE13"
					ifelse([$3], , , $3),
					AC_MSG_RESULT(no)
					ifelse([$5], , , $5)
					)
			fi
   		fi
  		AC_SUBST(APACHE_DEFS)
  		AC_SUBST(APACHE_CFLAGS)
  		AC_SUBST(APACHE_CPPFLAGS)
		AC_SUBST(APACHE_INCDIR)
		AC_SUBST(APR_INCDIR)
		AC_SUBST(APU_INCDIR)
		AC_SUBST(APACHE_MODDIR)
		AC_SUBST(APACHE_VERSION)
		AC_SUBST(APXS_EXTENSION)
   	fi
])