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

[Peng Yu via llvm-dev]

> 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