Date: Fri, 19 Jun 2020 21:50:17 -0700 From: "Jin Guojun[VFF]" <jguojun@gmail.com> To: freebsd-questions@freebsd.org Subject: Re: Why clang/cc needs libgcc_s in 11.4-R Message-ID: <53331bc9-b5c9-df83-0b01-a56061faa6bb@gmail.com> In-Reply-To: <dd120fa2-d263-da99-f16a-82c15626b038@gmail.com> References: <dd120fa2-d263-da99-f16a-82c15626b038@gmail.com>
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This looks like a clang issue since version 6 because there is libgcc_s.so in /usr/lib, and it is a symlink to /lib/libgcc_s.so.1. A number of discussions about this issue on the Internet, but no real solution found. Does anyone have an idea on how to work around this problem? -Jin ll /usr/lib/libgcc_s.so lrwxr-xr-x 1 root wheel 23 Jun 12 11:28 /usr/lib/libgcc_s.so@ -> ../../lib/libgcc_s.so.1 ll /lib/libgcc_s.so.1 -r--r--r-- 1 root wheel 98912 Jun 12 11:28 /lib/libgcc_s.so.1 file /lib/libgcc_s.so.1 /lib/libgcc_s.so.1: ELF 64-bit LSB shared object, x86-64, version 1 (FreeBSD), statically linked, stripped On 06/19/20 20:49, Jin Guojun[VFF] wrote: > Just installed 11.4-R and try to build a shared library by passing > relocation flag from cc -Wl,-r to ld, but ld complains -lgcc_s not found: > > FBSD11: cc -Wl,-r -o libpixrect.so `lorder rast_mem.so rast_dump.so | > tsort` > /usr/bin/ld: cannot find -lgcc_s > cc: error: linker command failed with exit code 1 (use -v to see > invocation) > > FBSD11: cc -Wl,-r,-v -v -o libpixrect.so `lorder rast_mem.so > rast_dump.so | tsort` > FreeBSD clang version 10.0.0 (git@github.com:llvm/llvm-project.git > llvmorg-10.0.0-0-gd32170dbd5b) > Target: x86_64-unknown-freebsd11.4 > Thread model: posix > InstalledDir: /usr/bin > "/usr/bin/ld" --eh-frame-hdr -dynamic-linker /libexec/ld-elf.so.1 > --hash-style=both --enable-new-dtags -o libpixrect.so /usr/lib/crt1.o > /usr/lib/crti.o /usr/lib/crtbegin.o -L/usr/lib -r -v rast_dump.so > rast_mem.so -lgcc --as-needed -lgcc_s --no-as-needed -lc -lgcc > --as-needed -lgcc_s --no-as-needed /usr/lib/crtend.o /usr/lib/crtn.o > GNU ld 2.17.50 [FreeBSD] 2007-07-03 > /usr/bin/ld: cannot find -lgcc_s > > Why clang depends on gcc library? > Is any flag or ENV variable can overwrite this requirement? > If not, where can I get the libgcc_s? > > Thanks in advance, > -Jin
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