Replace config/config.awk with simple sed invocation

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz>
Closes #13316

Makefile.am

@@ -37,7 +37,6 @@ extra_HEADERS = zfs.release.in zfs_config.h.in
 endif
 
 EXTRA_DIST += autogen.sh copy-builtin
-EXTRA_DIST += config/config.awk config/rpm.am config/deb.am config/tgz.am
 EXTRA_DIST += AUTHORS CODE_OF_CONDUCT.md COPYRIGHT LICENSE META NEWS NOTICE
 EXTRA_DIST += README.md RELEASES.md
 EXTRA_DIST += module/lua/README.zfs module/os/linux/spl/README.md

config/config.awk

@@ -1,15 +0,0 @@
-# Remove default preprocessor define's from config.h
-#   PACKAGE
-#   PACKAGE_BUGREPORT
-#   PACKAGE_NAME
-#   PACKAGE_STRING
-#   PACKAGE_TARNAME
-#   PACKAGE_VERSION
-#   STDC_HEADERS
-#   VERSION
-
-BEGIN { RS = "" ; FS = "\n" }     \
-	!/.#define PACKAGE./ &&   \
-	!/.#define VERSION./ &&   \
-	!/.#define STDC_HEADERS./ \
-	{ print $0"\n" }

configure.ac

@@ -40,10 +40,10 @@ AC_CANONICAL_TARGET
 AM_MAINTAINER_MODE
 m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
 AM_INIT_AUTOMAKE([subdir-objects foreign])
+# Remove default macros from config.h:
+#   PACKAGE, PACKAGE_{BUGREPORT,NAME,STRING,TARNAME,VERSION}, STDC_HEADERS, VERSION
 AC_CONFIG_HEADERS([zfs_config.h], [
-	(mv zfs_config.h zfs_config.h.tmp &&
+	sed -nEi~ -e '/^$/be' -e 'N;N;/#define (PACKAGE|VERSION|STDC_HEADERS)/d' -e ':e' -e 'p' zfs_config.h && rm zfs_config.h~ || exit])
-	awk -f ${ac_srcdir}/config/config.awk zfs_config.h.tmp >zfs_config.h &&
-	rm zfs_config.h.tmp) || exit 1])
 
 LT_INIT
 AC_PROG_INSTALL