Build on Alpine Linux

[Nick]

Corrected a typo in the original message and forgot to mention this is
Alpine Linux v3.4.4


On Sat, 2016-10-08 at 00:49 -0400, Nick wrote:
> Any insight into building GCC on Alpine Linux?  I see it uses musl
> instead of glibc, not sure if that matters.
> 
> I've built GCC on various distros (RH, CentOS, Fedora, Ubuntu, Gentoo)
> without issue.  Using the same steps on Alpine does not work for me.
> 
> Here's what I tried:
> 
> First I installed the following in Alpine Linux:
> apk add build-base gcc g++ abuild binutils binutils-doc gcc-doc make
> coreutils 
> 
> Then these steps:
> - tar xjf gcc-4.9.3.tar.bz2
> - mkdir "build"
> - cd "build"
> - /home/build/gcc/gcc-4.9.3/configure
> --prefix=/home/build/build_toolchain --enable-threads=posix --enable-tls
> --enable-languages=c,c++ --disable-multilib
> - make
> 
> This is what I get:
> <snip>
> 
> make[4]: Leaving directory
> '/home/build/gcc/build/x86_64-unknown-linux-gnu/libgcc'
> make[3]: Leaving directory
> '/home/build/gcc/build/x86_64-unknown-linux-gnu/libgcc'
> mkdir -p -- x86_64-unknown-linux-gnu/libgomp
> Checking multilib configuration for libgomp...
> Configuring stage 1 in x86_64-unknown-linux-gnu/libgomp
> configure: creating cache ./config.cache
> checking for --enable-version-specific-runtime-libs... no
> checking for --enable-generated-files-in-srcdir... no
> checking build system type... x86_64-unknown-linux-gnu
> checking host system type... x86_64-unknown-linux-gnu
> checking target system type... x86_64-unknown-linux-gnu
> checking for a BSD-compatible install... /usr/bin/install -c
> checking whether build environment is sane... yes
> checking for a thread-safe mkdir -p... /bin/mkdir -p
> checking for gawk... awk
> checking whether make sets $(MAKE)... yes
> checking for
> x86_64-unknown-linux-gnu-gcc... /home/build/gcc/build/./gcc/xgcc
> -B/home/build/gcc/build/./gcc/
> -B/home/build/build_toolchain/x86_64-unknown-linux-gnu/bin/
> -B/home/build/build_toolchain/x86_64-unknown-linux-gnu/lib/
> -isystem /home/build/build_toolchain/x86_64-unknown-linux-gnu/include
> -isystem /home/build/build_toolchain/x86_64-unknown-linux-gnu/sys-include   
> checking for C compiler default output file name... a.out
> checking whether the C compiler works... configure: error: in
> `/home/build/gcc/build/x86_64-unknown-linux-gnu/libgomp':
> configure: error: cannot run C compiled programs.
> If you meant to cross compile, use `--host'.
> See `config.log' for more details.
> Makefile:21021: recipe for target 'configure-stage1-target-libgomp'
> failed
> make[2]: *** [configure-stage1-target-libgomp] Error 1
> </snip>
> 
> 
> I looked in the files
> in /home/build/gcc/build/x86_64-unknown-linux-gnu/libgomp but didn't
> find any more clues.
> 
> I tried to get the make system to output the contents of the test file
> (conftest.c) but could only get it for the top-level directory, not
> libgomp.
> 
> So I created a tiny program and tested the command above:
> 
> alpine:~/gcc/build$ cat test.c 
> #include <stdio.h>
> 
> int main()
> {
> 	printf("Hello, world\n");
> 	return 0;
> }
> 
> alpineb1:~/gcc/build$ /home/build/gcc/build/./gcc/xgcc -B/home/bui
> ld/gcc/build/./gcc/ -B/home/build/build_toolchain/x86_64-unknown-l
> inux-gnu/bin/
> -B/home/build/build_toolchain/x86_64-unknown-linux-gnu/lib/
> -isystem /home/b
> uild/build_toolchain/x86_64-unknown-linux-gnu/include
> -isystem /home/build/build_toolchain/x86_64-unknown-linux-gnu/sys-include ./test.c 
> 
> alpineb1:~/gcc/build$ ./a.out 
> -ash: ./a.out: not found
> 
> alpineb1:~/gcc/build$ file ./a.out
> ./a.out: ELF 64-bit LSB executable, x86-64, version 1 (SYSV),
> dynamically linked, interpreter /lib64/ld-linux-x86-64.so.2, not
> stripped
> 
> alpineb1:~/gcc/build$ ldd ./a.out 
> ldd: ./a.out: Not a valid dynamic program
> 
> So it seems to me that there's some type of incompatibility (or maybe a
> low-level missing dependency?) with the binary that's produced.
> 
> 
> Any suggestions are appreciated.
> 
>