bugManeage - Bugs: bug #56243, Building GCC on Mac OS: libiberty...


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bug #56243: Building GCC on Mac OS: libiberty is using clang

Submitter:  Mohammad Akhlaghi <makhlaghi>
Submitted:  Tue 30 Apr 2019 09:37:33 AM UTC
Category:  Software Severity:  4 - Important
Item Group:  Crash Status:  Postponed
Privacy:  Public Assigned to:  None
Open/Closed:  Open

Fri 08 Nov 2019 12:24:47 PM UTC, comment #1: 

There is a nice wiki-page describing GCC that also has a section for macOS users:

It may have some good hints to fix this problem.

Mohammad Akhlaghi <makhlaghi>
Project Administrator
Tue 30 Apr 2019 09:37:33 AM UTC, original submission:  

When trying to build GCC from source on a Mac OS system, we get the following error.

libtool: compile:  /myid/reproducible-paper/build/dependencies/gcc-build/./gcc/xgcc -B/myid/reproducible-paper/build/dependencies/gcc-build/./gcc/ -B/myid/reproducible-paper/build/dependencies/installed/x86_64-apple-darwin17.7.0/bin/ -B/myid/reproducible-paper/build/dependencies/installed/x86_64-apple-darwin17.7.0/lib/ -isystem /myid/reproducible-paper/build/dependencies/installed/x86_64-apple-darwin17.7.0/include -isystem /myid/reproducible-paper/build/dependencies/installed/x86_64-apple-darwin17.7.0/sys-include /myid/reproducible-paper/build/dependencies/gcc-8.3.0/libobjc/thr.c -c -I. -I/myid/reproducible-paper/build/dependencies/gcc-8.3.0/libobjc -g -O2 -W -Wall -Wwrite-strings -Wstrict-prototypes -DIN_GCC -DIN_TARGET_LIBS -fno-strict-aliasing -fexceptions -I/myid/reproducible-paper/build/dependencies/gcc-8.3.0/libobjc/../gcc -I/myid/reproducible-paper/build/dependencies/gcc-8.3.0/libobjc/../gcc/config -I../.././gcc -I/myid/reproducible-paper/build/dependencies/gcc-8.3.0/libobjc/../libgcc -I../libgcc -I/myid/reproducible-paper/build/dependencies/gcc-8.3.0/libobjc/../include -o thr.o >/dev/null 2>&1
g++ -std=gnu++98   -g -O2 -DIN_GCC     -fno-exceptions -fno-rtti -fasynchronous-unwind-tables -W -Wall -Wno-narrowing -Wwrite-strings -Wcast-qual -Wmissing-format-attribute -Woverloaded-virtual -pedantic -Wno-long-long -Wno-variadic-macros -Wno-overlength-strings   -DHAVE_CONFIG_H -DGENERATOR_FILE -fno-PIE -static-libstdc++ -static-libgcc   -o build/genchecksum \
    build/genchecksum.o .././libiberty/libiberty.a
clang: error: unsupported option '-static-libgcc'
make[3]: *** [Makefile;2869: build/genchecksum] Error 1
make[3]: Leaving directory '/myid/reproducible-paper/build/dependencies/gcc-build/gcc'
make[2]: *** [Makefile;4624: all-gcc] Error 2
make[2]: *** Waiting for unfinished jobs....

It is apparently because the final call to `g++' is using the host's compiler (clang which doesn't support `-static-libgcc'). This is strange, because during the configuration step, checks if the compiler is GNU and it says yes! But probably that is because its checking the temporary `/myid/reproducible-paper/build/dependencies/gcc-build/./gcc/xgcc'.

Mohammad Akhlaghi <makhlaghi>
Project Administrator


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