config: check for parallel(1), use it for cstyle

Before: $ time make cstyle real 0m23.118s user 0m23.002s sys 0m0.114s After: $ time make cstyle real 0m4.577s user 0m31.487s sys 0m0.699s Reviewed-by: Brian Behlendorf <[email protected]> Signed-off-by: Ahelenia Ziemiańska <[email protected]> Issue openzfs#12899
nicman23 · Aug 22, 2022 · 0e01a69 · 0e01a69
1 parent a10f847
commit 0e01a69
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Showing 3 changed files with 15 additions and 1 deletion.
diff --git a/Makefile.am b/Makefile.am
@@ -114,14 +114,19 @@ commitcheck:
 		${top_srcdir}/scripts/commitcheck.sh; \
 	fi
 
+if HAVE_PARALLEL
+cstyle_line = -print0 | parallel -X0 ${top_srcdir}/scripts/cstyle.pl -cpP {}
+else
+cstyle_line = -exec ${top_srcdir}/scripts/cstyle.pl -cpP {} +
+endif
 PHONY += cstyle
 cstyle:
 	@find ${top_srcdir} -name build -prune \
 		-o -type f -name '*.[hc]' \
 		! -name 'zfs_config.*' ! -name '*.mod.c' \
 		! -name 'opt_global.h' ! -name '*_if*.h' \
 		! -path './module/zstd/lib/*' \
-		-exec ${top_srcdir}/scripts/cstyle.pl -cpP {} \+
+		$(cstyle_line)
 
 filter_executable = -exec test -x '{}' \; -print
 

diff --git a/config/always-parallel.m4 b/config/always-parallel.m4
@@ -0,0 +1,8 @@
+dnl #
+dnl # Check if GNU parallel is available.
+dnl #
+AC_DEFUN([ZFS_AC_CONFIG_ALWAYS_PARALLEL], [
+	AC_CHECK_PROG([PARALLEL], [parallel], [yes])
+
+	AM_CONDITIONAL([HAVE_PARALLEL], [test "x$PARALLEL" = "xyes"])
+])
diff --git a/config/zfs-build.m4 b/config/zfs-build.m4
@@ -226,6 +226,7 @@ AC_DEFUN([ZFS_AC_CONFIG_ALWAYS], [
 	ZFS_AC_CONFIG_ALWAYS_SED
 	ZFS_AC_CONFIG_ALWAYS_CPPCHECK
 	ZFS_AC_CONFIG_ALWAYS_SHELLCHECK
+	ZFS_AC_CONFIG_ALWAYS_PARALLEL
 ])
 
 AC_DEFUN([ZFS_AC_CONFIG], [