phi...@apache.org wrote on Tue, Jul 28, 2015 at 20:53:05 -0000: > Author: philip > Date: Tue Jul 28 20:53:04 2015 > New Revision: 1693159 > > URL: http://svn.apache.org/r1693159 > Log: > * build/ac-macros/apache.m4 (SVN_FIND_APACHE): Extract version with two > simpler sed commands to support Solaris and OSX sed. > > Modified: > subversion/trunk/build/ac-macros/apache.m4 > > Modified: subversion/trunk/build/ac-macros/apache.m4 > URL: > http://svn.apache.org/viewvc/subversion/trunk/build/ac-macros/apache.m4?rev=1693159&r1=1693158&r2=1693159&view=diff > ============================================================================== > --- subversion/trunk/build/ac-macros/apache.m4 (original) > +++ subversion/trunk/build/ac-macros/apache.m4 Tue Jul 28 20:53:04 2015 > @@ -97,9 +97,9 @@ fi > # PR 55397: https://issues.apache.org/bugzilla/show_bug.cgi?id=55397 > if test -n "$APXS" && test "$APXS" != "no"; then > AC_MSG_CHECKING([mod_dav version]) > - HTTPD_MAJOR=`$SED -ne '/^#define > AP_SERVER_MAJORVERSION_NUMBER/{s/^.*NUMBER *//;p}' > "$APXS_INCLUDE/ap_release.h"` > - HTTPD_MINOR=`$SED -ne '/^#define > AP_SERVER_MINORVERSION_NUMBER/{s/^.*NUMBER *//;p}' > "$APXS_INCLUDE/ap_release.h"` > - HTTPD_PATCH=`$SED -ne '/^#define AP_SERVER_PATCHLEVEL_NUMBER/{s/^.*NUMBER > *//;p}' "$APXS_INCLUDE/ap_release.h"` > + HTTPD_MAJOR=`$SED -ne '/^#define AP_SERVER_MAJORVERSION_NUMBER/p' > "$APXS_INCLUDE/ap_release.h" | $SED -e 's/^.*NUMBER *//'` > + HTTPD_MINOR=`$SED -ne '/^#define AP_SERVER_MINORVERSION_NUMBER/p' > "$APXS_INCLUDE/ap_release.h" | $SED -e 's/^.*NUMBER *//'` > + HTTPD_PATCH=`$SED -ne '/^#define AP_SERVER_PATCHLEVEL_NUMBER/p' > "$APXS_INCLUDE/ap_release.h" | $SED -e 's/^.*NUMBER *//'`
If we want to avoid parsing the header file, I think we could use AC_TRY_COMPILE() and check the values of the macros via preprocessor #if/#error/#endif directives.
