From: Chen Qi <[email protected]>
The '-fdebug-prefix-map' options are used to map source files locations,
otherwise, DW_AT_comp_dir will contain buildpath.
The '-gno-record-gcc-switches' option is used to fix the buildpath introduced
by '-fintrinsic-modules-path' option, which is automatically added by fortran.
Here's some output from 'readelf --debug-dump libgfortran.so.5.0.0' when this
option is not added:
"""
<0><1a37d3>: Abbrev Number: 4 (DW_TAG_compile_unit)
<1a37d4> DW_AT_producer : (indirect string, offset: 0xd653): GNU
Fortran2008 14.2.0 -m64
-march=core2 -mtune=core2 -msse3
-mfpmath=sse -mshstk -g -O2 -O2 -fstack-protector-strong
-fimplicit-none
-fno-repack-arrays -fno-underscoring -fcf-protection=full
-fallow-leading-underscore -fbuilding-libgfortran -fPIC
-fintrinsic-modules-path
/ala-lpggp72/qichen/Yocto/builds/build-poky/tmp/work/
core2-64-poky-linux/libgfortran/14.2.0/recipe-sysroot-native/usr/bin/x86_64-poky-linux
/../../lib/x86_64-poky-linux/gcc/x86_64-poky-linux/14.2.0/finclude
-fpre-include=../../../../recipe-sysroot/usr/include/finclude/math-vector-fortran.h
"""
See https://gcc.gnu.org/pipermail/fortran/2024-October/061204.html for more
detailed information.
Signed-off-by: Chen Qi <[email protected]>
---
meta/recipes-devtools/gcc/libgfortran.inc | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/meta/recipes-devtools/gcc/libgfortran.inc
b/meta/recipes-devtools/gcc/libgfortran.inc
index c68645e392..2a08872c25 100644
--- a/meta/recipes-devtools/gcc/libgfortran.inc
+++ b/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}"
+export GFORTRAN = "${FC} -fcanon-prefix-map
-fdebug-prefix-map=${S}=${TARGET_DBGSRC_DIR}
-fdebug-prefix-map=${B}=${TARGET_DBGSRC_DIR} -gno-record-gcc-switches"
do_configure () {
for target in libbacktrace libgfortran
--
2.25.1
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