https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64810
--- Comment #6 from David Malcolm <dmalcolm at gcc dot gnu.org> --- I tried to configure the jit with just: --enable-host-shared --enable-languages=jit,c++ --disable-bootstrap --enable-checking=release but I ran into this error compiling libgcc: /usr/include/gnu/stubs.h:7:29: fatal error: gnu/stubs-soft.h: No such file or directory https://gcc.gnu.org/bugzilla/show_bug.cgi?id=62099#c5 said: "You need to use -with-float=hard when configuring GCC." hence I added --with-float=hard to the above when configuring. Was this correct? Doing so enabled the build to complete, and I was able to run "make check-jit", which showed the symptoms seen in comment #0. Specifically, if I hack up gcc/testsuite/jit.dg/harness.h to add: gcc_jit_context_set_bool_option ( ctxt, GCC_JIT_BOOL_OPTION_KEEP_INTERMEDIATES, 1); and run e.g. make check-jit RUNTESTFLAGS="jit.exp=test-hello-world.c" then gcc/testsuite/jit/test-hello-world.c.exe.log.txt shows that toplev is invoked thusly: JIT: entering: toplev::main JIT: argv[0]: ./test-hello-world.c.exe JIT: argv[1]: /tmp/libgccjit-KmhzbL/fake.c JIT: argv[2]: -fPIC JIT: argv[3]: -O3 JIT: argv[4]: -g JIT: argv[5]: -quiet JIT: argv[6]: --param JIT: argv[7]: ggc-min-expand=0 JIT: argv[8]: --param JIT: argv[9]: ggc-min-heapsize=0 and then the driver is invoked thus on the resulting .s file: JIT: entering: void gcc::jit::playback::context::invoke_driver(const char*, const char*, const char*, timevar_id_t, bool, bool) JIT: argv[0]: armv7l-unknown-linux-gnueabihf-gcc-5.0.0 JIT: argv[1]: -shared JIT: argv[2]: /tmp/libgccjit-KmhzbL/fake.s JIT: argv[3]: -o JIT: argv[4]: /tmp/libgccjit-KmhzbL/fake.so JIT: argv[5]: -fno-use-linker-plugin JIT: argv[6]: (null) (and the intermediates stay around due to the bool option above). Invoking the driver by hand with those args replicates the issue: $ LIBRARY_PATH=. ./armv7l-unknown-linux-gnueabihf-gcc-5.0.0 -shared /tmp/libgccjit-KmhzbL/fake.s -o /tmp/libgccjit-KmhzbL/fake.so -fno-use-linker-plugin ld: error: /tmp/libgccjit-KmhzbL/fake.so uses VFP register arguments, /tmp/ccCFmkbn.o does not ld: failed to merge target specific data of file /tmp/ccCFmkbn.o Invoking the driver with "-v" shows the commands it's running: as -v -mfloat-abi=hard -meabi=5 -o /tmp/ccBPOxW0.o /tmp/libgccjit-KmhzbL/fake.s GNU assembler version 2.24 (armv7hl-redhat-linux-gnueabi) using BFD version version 2.24 ld --eh-frame-hdr -shared -dynamic-linker /lib/ld-linux-armhf.so.3 -X -m armelf_linux_eabi -o /tmp/libgccjit-KmhzbL/fake.so /lib/crti.o ./crtbeginS.o -L. /tmp/ccBPOxW0.o -lgcc --as-needed -lgcc_s --no-as-needed -lc -lgcc --as-needed -lgcc_s --no-as-needed ./crtendS.o /lib/crtn.o /usr/bin/ld: error: /tmp/libgccjit-KmhzbL/fake.so uses VFP register arguments, /tmp/ccT3rLos.o does not /usr/bin/ld: failed to merge target specific data of file /tmp/ccT3rLos.o FWIW, eu-readelf on the .o file shows: Object attributes section [16] '.ARM.attributes' of 47 bytes at offset 0x35b: Owner Size aeabi 46 File: 36 CPU_name: ARM10TDMI CPU_arch: v5T ARM_ISA_use: Yes THUMB_ISA_use: Thumb-1 ABI_FP_denormal: Needed ABI_FP_exceptions: Needed ABI_FP_number_model: IEEE 754 ABI_align8_needed: Yes ABI_align8_preserved: Yes, except leaf SP ABI_enum_size: int ABI_optimization_goals: Aggressive Speed
