bitbake.conf: Switch prefix mapping to use -ffile-prefix-map

-ffile-prefix map is more comprehensive when it comes to reproducible
builds and its superset of all prefix-mapping options in compilers

This makes is cleaner and workable across gcc and clang, clang does not
support -fcanon-prefix-map and it has to be explicitly omitted when using
clang.

There are lambdas generated in templates by clang which still get the
absolute paths despite -fdebug-prefix-map, this helps with that as well.

nasm is an outlier and we have fixed it by adding -fdebug-prefix-map option
luckily we do not pass DEBUG_PREFIX_MAP to nasm, in all recipes which use
nasm either pass -fdebug-prefix-map explicitly to nasm or they rewrite it
to use nasm flags syntax.

We have discussed this in past [1]

[1] https://patchwork.yoctoproject.org/project/oe-core/patch/20230428032030.2047920-1-raj.khem@gmail.com/#10281

(From OE-Core rev: ff73fa7ef7666a6dbe34f15515bc3ab6e574c5b0)

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Cc: Jacob Kroon <jacob.kroon@gmail.com>
Cc: Martin Jansa <Martin.Jansa@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/classes-recipe/kernel-arch.bbclass

@@ -73,10 +73,8 @@ HOST_OBJCOPY_KERNEL_ARCH ?= "${TARGET_OBJCOPY_KERNEL_ARCH}"
 
 KERNEL_CC = "${CCACHE}${HOST_PREFIX}gcc ${HOST_CC_KERNEL_ARCH} \
  -fuse-ld=bfd ${DEBUG_PREFIX_MAP} \
- -fdebug-prefix-map=${STAGING_KERNEL_DIR}=${KERNEL_SRC_PATH} \
- -fmacro-prefix-map=${STAGING_KERNEL_DIR}=${KERNEL_SRC_PATH} \
- -fdebug-prefix-map=${STAGING_KERNEL_BUILDDIR}=${KERNEL_SRC_PATH} \
- -fmacro-prefix-map=${STAGING_KERNEL_BUILDDIR}=${KERNEL_SRC_PATH} \
+ -ffile-prefix-map=${STAGING_KERNEL_DIR}=${KERNEL_SRC_PATH} \
+ -ffile-prefix-map=${STAGING_KERNEL_BUILDDIR}=${KERNEL_SRC_PATH} \
 "
 KERNEL_LD = "${HOST_PREFIX}ld.bfd ${HOST_LD_KERNEL_ARCH}"
 KERNEL_AR = "${HOST_PREFIX}ar ${HOST_AR_KERNEL_ARCH}"

meta/conf/bitbake.conf

@@ -652,15 +652,11 @@ EXTRA_OEMAKE:prepend:task-install = "${PARALLEL_MAKEINST} "
 ##################################################################
 TARGET_DBGSRC_DIR ?= "/usr/src/debug/${PN}/${PV}"
 # Beware: applied last to first
-DEBUG_PREFIX_MAP ?= "-fcanon-prefix-map \
- -fmacro-prefix-map=${S}=${TARGET_DBGSRC_DIR} \
- -fdebug-prefix-map=${S}=${TARGET_DBGSRC_DIR} \
- -fmacro-prefix-map=${B}=${TARGET_DBGSRC_DIR} \
- -fdebug-prefix-map=${B}=${TARGET_DBGSRC_DIR} \
- -fdebug-prefix-map=${STAGING_DIR_HOST}= \
- -fmacro-prefix-map=${STAGING_DIR_HOST}= \
- -fdebug-prefix-map=${STAGING_DIR_NATIVE}= \
- -fmacro-prefix-map=${STAGING_DIR_NATIVE}= \
+DEBUG_PREFIX_MAP ?= "\
+ -ffile-prefix-map=${S}=${TARGET_DBGSRC_DIR} \
+ -ffile-prefix-map=${B}=${TARGET_DBGSRC_DIR} \
+ -ffile-prefix-map=${STAGING_DIR_HOST}= \
+ -ffile-prefix-map=${STAGING_DIR_NATIVE}= \
 "
 DEBUG_LEVELFLAG ?= "-g"
 

meta/lib/oe/package.py

@@ -991,7 +991,7 @@ def copydebugsources(debugsrcdir, sources, d):
 
         prefixmap = {}
         for flag in cflags.split():
-            if not flag.startswith("-fdebug-prefix-map"):
+            if not flag.startswith("-ffile-prefix-map"):
                 continue
             if "recipe-sysroot" in flag:
                 continue

meta/recipes-devtools/gcc/libgfortran.inc

@@ -8,7 +8,7 @@ EXTRA_OECONF_PATHS = "\
 # An arm hard float target like raspberrypi4 won't build
 # as CFLAGS don't make it to the fortran compiler otherwise
 # (the configure script sets FC to $GFORTRAN unconditionally)
-export GFORTRAN = "${FC} -fcanon-prefix-map -fdebug-prefix-map=${S}=${TARGET_DBGSRC_DIR} -fdebug-prefix-map=${B}=${TARGET_DBGSRC_DIR} -gno-record-gcc-switches"
+export GFORTRAN = "${FC} -ffile-prefix-map=${S}=${TARGET_DBGSRC_DIR} -ffile-prefix-map=${B}=${TARGET_DBGSRC_DIR} -gno-record-gcc-switches"
 
 do_configure () {
 	for target in libbacktrace libgfortran

meta/recipes-devtools/python/python3-maturin_1.8.3.bb

@@ -10,7 +10,7 @@ SRC_URI[sha256sum] = "304762f86fd53a8031b1bf006d12572a2aa0a5235485031113195cc015
 
 S = "${WORKDIR}/maturin-${PV}"
 
-CFLAGS += "-fdebug-prefix-map=${CARGO_HOME}=${TARGET_DBGSRC_DIR}/cargo_home"
+CFLAGS += "-ffile-prefix-map=${CARGO_HOME}=${TARGET_DBGSRC_DIR}/cargo_home"
 
 DEPENDS += "\
     python3-setuptools-rust-native \

meta/recipes-devtools/rust/cargo_1.85.1.bb

@@ -19,7 +19,7 @@ CARGO_VENDORING_DIRECTORY = "${RUSTSRC}/vendor"
 
 inherit cargo pkgconfig
 
-DEBUG_PREFIX_MAP += "-fdebug-prefix-map=${RUSTSRC}/vendor=${TARGET_DBGSRC_DIR}"
+DEBUG_PREFIX_MAP += "-ffile-prefix-map=${RUSTSRC}/vendor=${TARGET_DBGSRC_DIR}"
 
 do_cargo_setup_snapshot () {
 	${UNPACKDIR}/rust-snapshot-components/${CARGO_SNAPSHOT}/install.sh --prefix="${WORKDIR}/${CARGO_SNAPSHOT}" --disable-ldconfig