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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 $AP_CFLAGS"
    if test $releasetest -eq 20; then
        CFLAGS="$CFLAGS $APU_INCLUDES $APR_INCLUDES"
    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) &&
        ( (minor2 > minor1) ||
        ((minor2 == minor1) && (micro2 >= micro1)) ) ) {
        exit(0);
    } else {
        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 $AP_CFLAGS"
            if test $releasetest -eq 20; then
                CFLAGS="$CFLAGS $APU_INCLUDES $APR_INCLUDES"
            fi
            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
])