[ptxdist] [PATCH] ptxd_make_world_compile_commands_filter: Fix grep for uptodate check

["Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>]

The intend here is to check the return code of grep, no need to call [
(i.e. test). This fixes an error message:

	environment: line 10: [: syntax error: `-q' unexpected

Additionally add -e to force interpretation of
"${PTXDIST_CROSS_CPPFLAGS}" as pattern. For me
${PTXDIST_CROSS_CPPFLAGS} starts with -isystem; without -e this is
interpreted as option to grep instead of pattern which makes grep emit

	grep: invalid option -- 't'

.)

Also add -F to make grep use a fixed-string compare (instead of
interpreting ${PTXDIST_CROSS_CPPFLAGS} as regexp).

Fixes: ac0aac7fc727 ("impove compile_commands.json handling")
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
---
 scripts/lib/ptxd_make_world_compile_commands.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/scripts/lib/ptxd_make_world_compile_commands.sh b/scripts/lib/ptxd_make_world_compile_commands.sh
index 56d7378fa28b..2703b5497799 100644
--- a/scripts/lib/ptxd_make_world_compile_commands.sh
+++ b/scripts/lib/ptxd_make_world_compile_commands.sh
@@ -21,7 +21,7 @@ ptxd_make_world_compile_commands_filter() {
     fi
 
     if [ "${src_cmds}" = "${dst_cmds}" ]; then
-	if [ grep -q "${PTXDIST_CROSS_CPPFLAGS}" "${src_cmds}" ]; then
+	if grep -q -F -e "${PTXDIST_CROSS_CPPFLAGS}" "${src_cmds}"; then
 	    ptxd_warning "compile_commands.json is already up to date!"
 	    return
 	fi
-- 
2.39.0