Building with debug symbols

[ebruno]

Digging in to this a bit more found in src/Makefile.efl line 9 LDFLAGS += -q -S

-S tells the linker to strip Omit debugger symbol information (but not all symbols) from the output file.

However when build with the -S flag I get

ld -m elf_x86_64 -q --gc-sections -static -T scripts/efi.lds -u _efi_start --defsym check__efi_start=_efi_start -u obj_snp --defsym check_obj_snp=obj_snp -u obj_intelx --defsym c\
heck_obj_intelx=obj_intelx -u obj_config --defsym check_obj_config=obj_config -u obj_config_efi --defsym check_obj_config_efi=obj_config_efi --defsym pci_vendor_id=0 --defsym pci_dev\
ice_id=0 -e _efi_start bin-x86_64-efi/version.snp--intelx.efi.o bin-x86_64-efi/blib.a -o bin-x86_64-efi/snp--intelx.efi.tmp \
--defsym _build_id=`perl -e 'printf "0x%08x", int ( rand ( 0xffffffff ) );'` \
--defsym _build_timestamp=1551225293 \
-Map bin-x86_64-efi/snp--intelx.efi.tmp.map
objdump -ht bin-x86_64-efi/snp--intelx.efi.tmp | perl ./util/sortobjdump.pl >> bin-x86_64-efi/snp--intelx.efi.tmp.map
./util/elf2efi64 --subsystem=10 bin-x86_64-efi/snp--intelx.efi.tmp bin-x86_64-efi/snp--intelx.efi
Unrecognised relocation type 10
Makefile.efi:25: recipe for target 'bin-x86_64-efi/snp--intelx.efi' failed
make[2]: *** [bin-x86_64-efi/snp--intelx.efi] Error 1
rm bin-x86_64-efi/version.snp--intelx.efi.o



snp--intelx.efi.tmp now has debug symbols
ericb@bsdpemulator-01:~/SystemReprovisioningTools/ZeroTouchOS$ gdb ipxe/src/bin-x86_64-efi/snp--intelx.efi.tmp
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Reading symbols from ipxe/src/bin-x86_64-efi/snp--intelx.efi.tmp...done.
(gdb) list
14
15 FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
16
17 #include <stddef.h>
18 #include <stdio.h>
19 #include <ipxe/init.h>
20 #include <ipxe/version.h>
21 #include <usr/autoboot.h>
22
23 /**
(gdb) list main
23 /**
24 * Main entry point
25 *
26 * @ret rc Return status code
27 */
28 __asmcall int main ( void ) {
29 int rc;
30
31 /* Perform one-time-only initialisation (e.g. heap) */
32 initialise();

If add -S to LDFLAGS the build completes but no debug symbols in the binaries.

/util/elf2efi64 seems to application having an issue.

/util/elf2efi64 --subsystem=10 bin-x86_64-efi/snp--intelx.efi.tmp bin-x86_64-efi/snp--intelx.efi
Unrecognised relocation type 10
Makefile.efi:25: recipe for target 'bin-x86_64-efi/snp--intelx.efi' failed