imx-cst:fix race condition build error

Add missing makefile rule depedency on compilation of cst_lexer.c, which
require header cst_parser.h generated at compilation with cst_parser.c

This issue has been detected during the Yocto autobuilder test CI,
probably during a high CPU load
(https://autobuilder.yoctoproject.org/valkyrie/#/builders/87/builds/46/steps/33/logs/stdio).

Signed-off-by: Kelefa Sane <kelefa.sane@smile.fr>
Reviewed-by: Yoann Congal <yoann.congal@smile.fr>
Signed-off-by: Khem Raj <raj.khem@gmail.com>

meta-oe/recipes-support/imx-cst/imx-cst/0001-fix-missing-makefile-rule-dependency.patch

@@ -0,0 +1,45 @@
+From 73509cb22ffab827dc3e3ccda2781683b8e8296d Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?K=C3=A9l=C3=A9fa=20San=C3=A9?= <kelefa.sane@smile.fr>
+Date: Mon, 2 Jun 2025 11:07:08 +0200
+Subject: [PATCH] fix missing makefile rule dependency
+
+During, the package build with an high CPU load we can face
+a build failed issue, caused by the header file cst_parser.h not present
+when compiling cst_lexer.c, which depend on cst_parser.h:
+| x86_64-poky-linux-gcc  ... -c cst_lexer.c -o cst_lexer.d
+| ../../code/front_end/src/cst_lexer.l:21:10: fatal error:
+|cst_parser.h: No such file or directory
+|    21 | #include "cst_parser.h"
+|       |          ^~~~~~~~~~~~~~
+| compilation terminated.
+
+The file cst_parser.h is generated during compilation
+by a makefile rule which also generate cst_parser.c
+
+To fix the issue, makefile rule needed to be update
+in order for compilation of cst_lexer.c to be done,
+always after the generation of cst_parser.h and .c
+
+Upstream-Status: Submitted [https://community.nxp.com/t5/Other-NXP-Products/Package-imx-code-signing-tool-3-4-0-dfsg-2-build-issue/m-p/2108575#M28853]
+
+Signed-off-by: Kelefa Sane <kelefa.sane@smile.fr>
+---
+ code/build/make/rules.mk | 5 +++++
+ 1 file changed, 5 insertions(+)
+
+diff --git a/code/build/make/rules.mk b/code/build/make/rules.mk
+index 7720e4b..239108b 100644
+--- a/code/build/make/rules.mk
++++ b/code/build/make/rules.mk
+@@ -35,6 +35,11 @@ LFLAGS  := -t
+ 	@echo "Link $@"
+ 	$(LD) $^ $(LDFLAGS) -o $@
+ 
++# Compilation of cst_lexer.c require cst_parser.h 
++# (cst_lexer.c include cst_parser.h) which is generated
++# by the same makefile genrating cst_parser.c
++cst_lexer.o: cst_parser.c
++
+ %.o: %.c
+ 	@echo "Compile $@"
+ 	# generate dependency file

meta-oe/recipes-support/imx-cst/imx-cst_3.4.0.bb

@@ -16,6 +16,7 @@ DEBIAN_PGK_VERSION = "${PV}+dfsg"
 
 SRC_URI = "\
     ${DEBIAN_MIRROR}/main/i/${DEBIAN_PGK_NAME}/${DEBIAN_PGK_NAME}_${DEBIAN_PGK_VERSION}.orig.tar.xz \
+    file://0001-fix-missing-makefile-rule-dependency.patch \
 "
 
 SRC_URI[sha256sum] = "52ee3cee3bc500a42095f73c4584e223b4b9d2dfc1cd3e5df965c5952eba8c8d"