util/genbuild_h: Update IASL location finding code

Update the iasl path finding code to use XGCCPATH if it's set, and to
look for iasl on the path if it's not set and not under util/crossgcc.

On the jenkins builders, iasl is in the path, not in util/crossgcc/xgcc.

On the systems of people who have multiple copies of coreboot, it makes
sense to just have a single copy of the toolchain and define XGCCPATH in
the environment to point to it.

Previously, either of these situations resulted in a warning from the
genbuild_h tool that iasl was not found under util/crossgcc, which was
true, but not particularly relevant, and generated confusion.

If xcompile already existed before make was run, the correct path would
be found, but on an initial build, this check couldn't find iasl.

BUG=None
TEST=Build with iasl in /util/crossgcc/xgcc/bin, in the path and in a
directory pointed to with XGCCPATH.

Signed-off-by: Martin Roth <martin@coreboot.org>
Change-Id: Ic2f8dca0be8bfb54d3c672fab6cf6f005bb394c3
Reviewed-on: https://review.coreboot.org/c/coreboot/+/54001
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
Reviewed-by: Patrick Georgi <pgeorgi@google.com>

1 files changed, 10 insertions, 2 deletions

diff --git a/util/genbuild_h/genbuild_h.sh b/util/genbuild_h/genbuild_h.sh
index 10ca0c5fa3..c898fb6e3f 100755
--- a/util/genbuild_h/genbuild_h.sh
+++ b/util/genbuild_h/genbuild_h.sh
@@ -5,6 +5,7 @@
 DATE=""
 GITREV=""
 TIMESOURCE=""
+XGCCPATH="${XGCCPATH:-util/crossgcc/xgcc/bin/}"
 
 export LANG=C
 export LC_ALL=C
@@ -47,8 +48,15 @@ NetBSD|OpenBSD|DragonFly|FreeBSD|Darwin)
 esac
 }
 
-IASL=util/crossgcc/xgcc/bin/iasl
+# Look for IASL in XGCCPATH and xcompile.  Unfortunately,
+# xcompile isn't available on the first build.
+# If neither of those gives a valid iasl, check the path.
+IASL="${XGCCPATH}iasl"
 eval $(grep ^IASL:= "$XCOMPILE" 2>/dev/null | sed s,:=,=,)
+if [ ! -x "${IASL}" ]; then
+	IASL=$(command -v iasl)
+fi
+IASLVERSION="$(${IASL} -v | grep version | sed 's/.*version //')" >/dev/null
 
 #Print out the information that goes into build.h
 printf "/* build system definitions (autogenerated) */\n"
@@ -72,5 +80,5 @@ printf "#define COREBOOT_BUILD_EPOCH \"$(our_date "$DATE" +%s)\"\n"
 printf "#define COREBOOT_DMI_DATE \"$(our_date "$DATE" +%m/%d/%Y)\"\n"
 printf "\n"
 printf "#define COREBOOT_COMPILE_TIME \"$(our_date "$DATE" +%T)\"\n"
-printf "#define ASL_VERSION 0x%d\n" `$IASL -v | grep version | sed 's/.*version //'`
+printf "#define ASL_VERSION 0x%d\n" "${IASLVERSION}"
 printf "#endif\n"