[LLVMdev] "clang -v" shows a GCC call

[Jim Grosbach]

llvm (and clang) do not include binutils. You're seeing clang invoking the gcc shell to assemble the .s file that clang generated, then again to link the object file into an executable.

On Apr 27, 2010, at 8:31 AM, Swiss Guy wrote:

> 
> Hi everyone, 
> 
> I'm very new to the world of compilation and I've got to spend some time
> time on LLVM.
> As I have to produce a cross compiler for a completely new target and I
> don't want to cross-build the binutils, I choose Clang as a replacement
> frontend for llvm instead of llvm-gcc.
> 
> But first, I just would like to compile something on my Linux platform in
> order to test the software, no question about cross-compiling at the moment.
> The only problem is that every time I try to compile using the command
> below, I get this result telling me that Clang is calling gcc instead of all
> the LLVM tools
> 
> Here's the command and the result (I skipped a line at each GCC call):
> 
> 
> $clang -v hello.c
> 
> clang version 1.0 (https://llvm.org/svn/llvm-project/cfe/branches/release_26
> exported)
> Target: i386-pc-linux-gnu
> Thread model: posix
> "/bin/clang-cc" -triple i386-pc-linux-gnu -S -disable-free -main-file-name
> main.c --relocation-model static --disable-fp-elim --unwind-tables=0
> --mcpu=pentium4 --fmath-errno=1 -v -fdiagnostics-show-option -o
> /tmp/cc-G6QVZj.s -x c main.c
> clang-cc version 1.0 based upon llvm 2.6 hosted on i686-pc-linux-gnu
> ignoring nonexistent directory "/System/Library/Frameworks"
> ignoring nonexistent directory "/Library/Frameworks"
> #include "..." search starts here:
> #include <...> search starts here:
> /lib/clang/1.0/include
> /usr/include
> End of search list.
> 
> "/usr/bin/gcc" -v -c -m32 -o /tmp/cc-J586JU.o -x assembler /tmp/cc-G6QVZj.s
> Reading specs from /usr/lib/gcc/i686-pc-cygwin/3.4.4/specs
> Configured with: ../configure --verbose --program-suffix=-3 --prefix=/usr
> --exec-prefix=/usr --sysconfdir=/etc --libdir=/usr/lib --libexecdir=/usr/lib
> --mandir=/usr/share/man --infodir=/usr/share/info
> --enable-languages=c,ada,c++,d,f77,pascal,java,objc --enable-nls
> --without-included-gettext --enable-version-specific-runtime-libs
> --without-x --enable-libgcj --disable-java-awt --with-system-zlib
> --enable-interpreter --disable-libgcj-debug --enable-threads=posix
> --enable-java-gc=boehm --disable-win32-registry --enable-sjlj-exceptions
> --enable-hash-synchronization --enable-libstdcxx-debug
> Thread model: posix
> gcc version 3.4.4 (Red Hat 3.4.4)
> as -o /tmp/cc-J586JU.o /tmp/cc-G6QVZj.s
> 
> "/usr/bin/gcc" -v -m32 -o a.out /tmp/cc-J586JU.o
> Reading specs from /usr/lib/gcc/i686-pc-linux-gnu/3.4.4/specs
> Configured with: ../configure --verbose --program-suffix=-3 --prefix=/usr
> --exec-prefix=/usr --sysconfdir=/etc --libdir=/usr/lib --libexecdir=/usr/lib
> --mandir=/usr/share/man --infodir=/usr/share/info
> --enable-languages=c,ada,c++,d,f77,pascal,java,objc --enable-nls
> --without-included-gettext --enable-version-specific-runtime-libs
> --without-x --enable-libgcj --disable-java-awt --with-system-zlib
> --enable-interpreter --disable-libgcj-debug --enable-threads=posix
> --enable-java-gc=boehm --disable-win32-registry --enable-sjlj-exceptions
> --enable-hash-synchronization --enable-libstdcxx-debug
> Thread model: posix
> gcc version 3.4.4 (Red Hat 3.4.4)
> collect2 -Bdynamic --dll-search-prefix=cyg -o a.out
> /usr/lib/gcc/i686-pc-cygwin/3.4.4/../../../crt0.o
> -L/usr/lib/gcc/i686-pc-cygwin/3.4.4 -L/usr/lib/gcc/i686-pc-cygwin/3.4.4
> -L/usr/lib/gcc/i686-pc-cygwin/3.4.4/../../..
> /cygdrive/c/Users/lbonnet/AppData/Local/Temp/cc-J586JU.o -lgcc -lcygwin
> -luser32 -lkernel32 -ladvapi32 -lshell32 -lgcc
> 
> 
> Excuse me if I wrote something stupid or just forgetting something. Just
> tell me what's wrong.
> 
> Thanks in advance.
> -- 
> View this message in context: http://old.nabble.com/%22clang--v%22-shows-a-GCC-call-tp28378453p28378453.html
> Sent from the LLVM - Dev mailing list archive at Nabble.com.
> 
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