[Crash-utility] Re: [PATCH 1/1] Fix cross-compilation of eppic.so and snapper.so

Mkbaseop needs to be compiled for the host (so gcc NOT CC). I thought I saw support for that in Petr's patch. "Do not hard-code to gcc except for mkbaseop.c"

> Hi, Petr > Thank you for the patch. > > On Wed, Mar 18, 2026 at 11:36 AM < > devel-request(a)lists.crash-utility.osci.io&gt; wrote: > >> Date: Thu, 12 Mar 2026 21:17:22 +0100 >> From: Petr Tesařík <petr(a)tesarici.cz&gt; (by way of Petr Tesařík >> <petr(a)tesarici.cz>) >> Subject: [Crash-utility] [PATCH 1/1] Fix cross-compilation of eppic.so >> and snapper.so >> To: devel(a)lists.crash-utility.osci.io >> Cc: Jianyun Gao <jianyungao89(a)gmail.com&gt; >> Message-ID: <20260312211722.4cab3d5a(a)meshulam.tesarici.cz&gt; >> Content-Type: text/plain; charset=US-ASCII >> >> When cross-compiling, the extension modules must be built for the >> target architecture, not the host architecture. >> >> Do not hard-code "gcc" (which is usually the host compiler), but >> use $(CC) to pick the right compiler. >> >> I got an error after applying the current patch: > > $ make CROSS_COMPILE=aarch64-linux-gnu- extensions > aarch64-linux-gnu-gcc -Wall -g -shared -rdynamic -o dminfo.so dminfo.c > -fPIC -DARM64 -DGDB_16_2 > aarch64-linux-gnu-gcc -Wall -g -shared -rdynamic -o echo.so echo.c -fPIC > -DARM64 -DGDB_16_2 > cd eppic/libeppic && make > bison -peppic -v -t -d eppic.y > eppic.y: warning: 135 shift/reduce conflicts [-Wconflicts-sr] > eppic.y: warning: 22 reduce/reduce conflicts [-Wconflicts-rr] > eppic.y: note: rerun with option '-Wcounterexamples' to generate conflict > counterexamples > aarch64-linux-gnu-gcc -g -O0 -fno-omit-frame-pointer -fPIC -c -o > eppic_util.o eppic_util.c > aarch64-linux-gnu-gcc -g -O0 -fno-omit-frame-pointer -fPIC -c -o > eppic_node.o eppic_node.c > aarch64-linux-gnu-gcc -g -O0 -fno-omit-frame-pointer -fPIC -c -o > eppic_var.o eppic_var.c > aarch64-linux-gnu-gcc -g -O0 -fno-omit-frame-pointer -fPIC -c -o > eppic_func.o eppic_func.c > aarch64-linux-gnu-gcc -g -O0 -fno-omit-frame-pointer -fPIC -c -o > eppic_str.o eppic_str.c > aarch64-linux-gnu-gcc -g -O0 -fno-omit-frame-pointer -fPIC -c -o > eppic_op.o eppic_op.c > aarch64-linux-gnu-gcc -g -O0 -fno-omit-frame-pointer -fPIC -c -o > eppic_num.o eppic_num.c > aarch64-linux-gnu-gcc -g -O0 -fno-omit-frame-pointer -fPIC -c -o > eppic_stat.o eppic_stat.c > aarch64-linux-gnu-gcc -g -O0 -fno-omit-frame-pointer -fPIC -c -o > eppic_builtin.o eppic_builtin.c > aarch64-linux-gnu-gcc -g -O0 -fno-omit-frame-pointer -fPIC -c -o > eppic_type.o eppic_type.c > aarch64-linux-gnu-gcc -g -O0 -fno-omit-frame-pointer -fPIC -c -o > eppic_case.o eppic_case.c > aarch64-linux-gnu-gcc -g -O0 -fno-omit-frame-pointer -fPIC -c -o > eppic_api.o eppic_api.c > aarch64-linux-gnu-gcc -g -O0 -fno-omit-frame-pointer -fPIC -c -o > eppic_member.o eppic_member.c > aarch64-linux-gnu-gcc -g -O0 -fno-omit-frame-pointer -fPIC -c -o > eppic_alloc.o eppic_alloc.c > aarch64-linux-gnu-gcc -g -O0 -fno-omit-frame-pointer -fPIC -c -o > eppic_define.o eppic_define.c > aarch64-linux-gnu-gcc -g -O0 -fno-omit-frame-pointer -fPIC -c -o > eppic_input.o eppic_input.c > aarch64-linux-gnu-gcc -g -O0 -fno-omit-frame-pointer -fPIC -c -o > eppic_print.o eppic_print.c > bison -peppicpp -v -t -d eppicpp.y > eppicpp.y: warning: 23 shift/reduce conflicts [-Wconflicts-sr] > eppicpp.y: note: rerun with option '-Wcounterexamples' to generate > conflict counterexamples > aarch64-linux-gnu-gcc -g -O0 -fno-omit-frame-pointer -fPIC -c > eppicpp.tab.c > aarch64-linux-gnu-gcc -g -O0 -fno-omit-frame-pointer -fPIC -c eppic.tab.c > flex -L -Peppic -t eppic.l > lex.eppic.c > aarch64-linux-gnu-gcc -g -O0 -fno-omit-frame-pointer -fPIC -c lex.eppic.c > flex -Peppicpp -t eppicpp.l > lex.eppicpp.c > aarch64-linux-gnu-gcc -g -O0 -fno-omit-frame-pointer -fPIC -c > lex.eppicpp.c > aarch64-linux-gnu-gcc -g -O0 -fno-omit-frame-pointer -fPIC -o mkbaseop > mkbaseop.c > ./mkbaseop > baseops.c > /bin/sh: 1: ./mkbaseop: Exec format error > make[5]: [Makefile:71: baseops.o] Error 126 (ignored) > ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ > > Did I miss anything else? > > ... > aarch64-linux-gnu-gcc -g -O0 -fno-omit-frame-pointer -fPIC -c baseops.c > ar cur libeppic.a eppic_util.o eppic_node.o eppic_var.o eppic_func.o > eppic_str.o eppic_op.o eppic_num.o eppic_stat.o eppic_builtin.o > eppic_type.o eppic_case.o eppic_api.o eppic_member.o eppic_alloc.o > eppic_define.o eppic_input.o eppic_print.o eppicpp.tab.o eppic.tab.o > lex.eppic.o lex.eppicpp.o baseops.o > ar: `u' modifier ignored since `D' is the default (see `U') > aarch64-linux-gnu-gcc -g -O0 -Ieppic/libeppic -I.. -nostartfiles -shared > -rdynamic -o eppic.so eppic/applications/crash/eppic.c -fPIC -DARM64 > -DGDB_16_2 -Leppic/libeppic -leppic > aarch64-linux-gnu-gcc -Wall -g -I. -shared -rdynamic -o snap.so snap.c > -fPIC -DARM64 -DGDB_16_2 > > Thanks > Lianbo > > >> Signed-off-by: Petr Tesarik <ptesarik(a)suse.com&gt; >> --- >> extensions/eppic.mk | 2 +- >> extensions/snap.mk | 2 +- >> 2 files changed, 2 insertions(+), 2 deletions(-) >> >> diff --git a/extensions/eppic.mk b/extensions/eppic.mk >> index 9435793..b51a84b 100644 >> --- a/extensions/eppic.mk >> +++ b/extensions/eppic.mk >> @@ -68,7 +68,7 @@ lib-eppic: >> cd eppic/libeppic && make >> >> eppic.so: ../defs.h $(APPFILE) lib-eppic >> - gcc -g -O0 -Ieppic/libeppic -I.. -nostartfiles -shared -rdynamic >> -o eppic.so $(APPFILE) -fPIC $(TARGET_FLAGS) $(GDB_FLAGS) -Leppic/libeppic >> -leppic >> + $(CC) -g -O0 -Ieppic/libeppic -I.. -nostartfiles -shared >> -rdynamic -o eppic.so $(APPFILE) -fPIC $(TARGET_FLAGS) $(GDB_FLAGS) >> -Leppic/libeppic -leppic >> >> clean: >> if [ -d eppic/libeppic ]; \ >> diff --git a/extensions/snap.mk b/extensions/snap.mk >> index 2fb4ed6..ac3f723 100644 >> --- a/extensions/snap.mk >> +++ b/extensions/snap.mk >> @@ -47,4 +47,4 @@ endif >> all: snap.so >> >> snap.so: $(INCDIR)/defs.h snap.c >> - gcc -Wall -g -I$(INCDIR) -shared -rdynamic -o snap.so snap.c >> -fPIC -D$(TARGET) $(TARGET_CFLAGS) $(GDB_FLAGS) >> + $(CC) -Wall -g -I$(INCDIR) -shared -rdynamic -o snap.so snap.c >> -fPIC -D$(TARGET) $(TARGET_CFLAGS) $(GDB_FLAGS) >> -- >> 2.53.0 >> > -- > Crash-utility mailing list -- devel(a)lists.crash-utility.osci.io > To unsubscribe send an email to devel-leave(a)lists.crash-utility.osci.io > https://${domain_name}/admin/lists/devel.lists.crash-utility.osci.io/ > Contribution Guidelines: https://github.com/crash-utility/crash/wiki > -- - Luc