[oi-dev] Specifying GCC as a compiler in a Makefile for simple library

[Reginald Beardsley]

FWIW I have NEVER ever seen a makefile that used a variable named COMPILER.  Moreover, given that Gnu make supports C, C++ and several flavors of FORTRAN by default, it seems unlikely that COMPILER is used anywhere.  You can test that assertion by not setting COMPILER and adding an "@echo $COMPILER" line to the all target.

I think you're misreading the make output.  It's referencing calling the linker.  The Gnu crowd like to have the compiler frontend do everything.  That's OK for single language packages, but doesn't work very well for a mixture of C++, C & FORTRAN.

The normal makefile directive is:

CC = gcc

or 

CC = /my/path/gcc

with the required tabs at the start of the rule.

In any event, "CC=gcc make library" is unlikely to work.

make library CC=gcc 

or make CC=gcc library

are normal invocations of make.

Hope this helps,
Reg

--------------------------------------------
On Sun, 5/15/16, Denys Rtveliashvili <denys at rtveliashvili.name> wrote:

 Subject: [oi-dev] Specifying GCC as a compiler in a Makefile for simple	library
 To: "OpenIndiana Developer mailing list" <oi-dev at openindiana.org>
 Date: Sunday, May 15, 2016, 6:19 PM
 
 
   
 
     
   
   
     Hello,
 
     
 
     I am trying to build a very simple library.
 
     That library has a Makefile and  the correct way to
 build it on
     Illumos would be to do this:
 
     
 
     CC=gcc make library
 
     
 
     So I wrote a Makefile for a oi-userland package with the
 following
     in it:
 
     
 
       COMPILER= gcc
 
     
 
     include
 $(WS_MAKE_RULES)/prep.mk
 
       include $(WS_MAKE_RULES)/justmake.mk
 
       include $(WS_MAKE_RULES)/ips.mk
     
 
     However, gmake build fails:
 
     
 
     symlink cloning
      
 /root/oi-userland/components/library/http-parser/http-parser-2.1
       to
 /root/oi-userland/components/library/http-parser/build/i86
 
       (cd
 /root/oi-userland/components/library/http-parser/build/i86;
       /usr/bin/env LD_OPTIONS="-M
 /usr/lib/ld/map.noexstk -M
       /usr/lib/ld/map.noexdata -M /usr/lib/ld/map.pagealign
 -Bdirect -z
       ignore" LD_EXEC_OPTIONS="-z
 aslr=disable" CCACHE="/usr/bin/ccache"
       CC_gcc_32="/usr/gcc/4.9/bin/gcc"
       CC_gcc_64="/usr/gcc/4.9/bin/gcc"
 CXX_gcc_32="/usr/gcc/4.9/bin/g++"
       CXX_gcc_64="/usr/gcc/4.9/bin/g++"
      
 CCACHE_BASEDIR="/root/oi-userland/components/library/http-parser/build/i86"
       /usr/gnu/bin/make  library)
 
       make[1]: Entering directory
      
 '/root/oi-userland/components/library/http-parser/build/i86'
 
       cc -I. -DHTTP_PARSER_STRICT=0  -Wall -Wextra
 -Werror -O3 
       -fPIC -c http_parser.c -o libhttp_parser.o
 
       cc: -W option with unknown program all
 
     
     
 
     So it is clear that it makes use of the
 "COMPILER" variable,
     otherwise it would not have had "CC_gcc_32" in
 the messages.
     However, it looks like it does not pass CC variable to
 the Makefile
     it eventually calls, so that Makefile is using the
 default (and
     incompatible) compiler.
 
     
 
     Please can you suggest something?
 
     
 
     With kind regards,
 
     Denys Rtveliashvili
 
   
 
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