llvm dev - Jan 2019 - How to generate .bc file using configure && make on Mac OS X?

Hi,

I use the following commands to compile a GNU package to .bc files on Linux.

./configure CC=clang RANLIB=llvm-ranlib CFLAGS=-flto
LDFLAGS=-Wl\,-plugin-opt=save-temps\ -flto\ -fuse-ld=gold
make

But since it uses ld.gold, it won't work on Mac OS X. Is there
something equivalent that works on Mac OS X? Thanks.

-- 
Regards,
Peng

Hi Peng,

On macOS you just omit the '-fuse-ld=gold' and it will work out of the
box.

Cheers,
Alex.
> On 25. Jan 2019, at 14:05, Peng Yu via llvm-dev <llvm-dev at
lists.llvm.org> wrote:
> 
> Hi,
> 
> I use the following commands to compile a GNU package to .bc files on
Linux.
> 
> ./configure CC=clang RANLIB=llvm-ranlib CFLAGS=-flto
> LDFLAGS=-Wl\,-plugin-opt=save-temps\ -flto\ -fuse-ld=gold
> make
> 
> But since it uses ld.gold, it won't work on Mac OS X. Is there
> something equivalent that works on Mac OS X? Thanks.
> 
> --
> Regards,
> Peng
> _______________________________________________
> LLVM Developers mailing list
> llvm-dev at lists.llvm.org
> https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-dev
--
AlexDenisov
Software Engineer, https://lowlevelbits.org
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> On macOS you just omit the '-fuse-ld=gold' and it will work out of
the box.
> > ./configure CC=clang RANLIB=llvm-ranlib CFLAGS=-flto
> > LDFLAGS=-Wl\,-plugin-opt=save-temps\ -flto\ -fuse-ld=gold
> > make
No. It doesn't work on Mac OS by just omitting '-fuse-ld=gold'.

$ ../../../extract/bash-5.0/configure CC=clang CXX=clang++
RANLIB=llvm-ranlib CFLAGS=-g\ -flto
LDFLAGS=-Wl\,-plugin-opt=save-temps\ -flto
checking build system type... x86_64-apple-darwin17.7.0
checking host system type... x86_64-apple-darwin17.7.0

Beginning configuration for bash-5.0-release for x86_64-apple-darwin17.7.0

checking for gcc... clang
checking whether the C compiler works... no
configure: error: in `/Users/pengy/homebake/work/bash/build/Linux/y':
configure: error: C compiler cannot create executables
See `config.log' for more details

Here is the relevant content from config.log

===configure:3750: checking whether the C compiler works
configure:3772: clang -g -flto  -Wl,-plugin-opt=save-temps -flto conftest.c 
>&5
ld: unknown option: -plugin-opt=save-temps
clang: error: linker command failed with exit code 1 (use -v to see invocation)
configure:3776: $? = 1
configure:3814: result: no
configure: failed program was:
| /* confdefs.h */
| #define PACKAGE_NAME "bash"
| #define PACKAGE_TARNAME "bash"
| #define PACKAGE_VERSION "5.0-release"
| #define PACKAGE_STRING "bash 5.0-release"
| #define PACKAGE_BUGREPORT "bug-bash at gnu.org"
| #define PACKAGE_URL ""
| #define ALIAS 1
| #define PUSHD_AND_POPD 1
| #define RESTRICTED_SHELL 1
| #define PROCESS_SUBSTITUTION 1
| #define PROMPT_STRING_DECODE 1
| #define SELECT_COMMAND 1
| #define HELP_BUILTIN 1
| #define ARRAY_VARS 1
| #define DPAREN_ARITHMETIC 1
| #define BRACE_EXPANSION 1
| #define COMMAND_TIMING 1
| #define EXTENDED_GLOB 1
| #define EXTGLOB_DEFAULT 0
| #define COND_COMMAND 1
| #define COND_REGEXP 1
| #define COPROCESS_SUPPORT 1
| #define ARITH_FOR_COMMAND 1
| #define NETWORK_REDIRECTIONS 1
| #define PROGRAMMABLE_COMPLETION 1
| #define DEBUGGER 1
| #define CASEMOD_ATTRS 1
| #define CASEMOD_EXPANSIONS 1
| #define GLOBASCII_DEFAULT 1
| #define FUNCTION_IMPORT 1
| #define MEMSCRAMBLE 1
| /* end confdefs.h.  */
|
| int
| main ()
| {
|
|   ;
|   return 0;
| }
configure:3819: error: in `/Users/pengy/homebake/work/bash/build/Linux/y':
configure:3821: error: C compiler cannot create executables
==
-- 
Regards,
Peng