Hi,
I'm trying to validate GHC head with GCC 4.7 on FreeBSD. I run
"validate" without any modifications:
% config_args="--prefix=/ghc-head
--with-iconv-includes=/usr/local/include
--with-iconv-libraries=/usr/local/lib
--with-gmp-includes=/usr/local/include
--with-gmp-libraries=/usr/local/lib
--with-gcc=/usr/local/bin/gcc47
--with-gcc-4.2=/usr/local/bin/gcc47
--with-system-libffi
--with-ffi-includes=/usr/local/include
--with-ffi-libraries=/usr/local/lib"
THREADS=10 sh validate
This caused an error:
Configuring terminfo-0.3.2.5...
configure: WARNING: unrecognized options: --with-compiler,
--with-iconv-includes, --with-iconv-libraries, --with-gmp-includes,
--with-gmp-libraries, --with-gcc
checking for gcc... cc
checking whether the C compiler works... no
configure: error: in `/usr/home/kazu/work/ghc/libraries/terminfo':
configure: error: C compiler cannot create executables
For GCC, "cc" is guessed. This is because "mk/config.mk.in" does not
use "gcc47" to CC_STAGE0. I don't know this is a correct way but I
patched as follows:
diff --git a/mk/config.mk.in b/mk/config.mk.in
index 55f5756..51d3e96 100644
--- a/mk/config.mk.in
+++ b/mk/config.mk.in
@@ -487,13 +487,13 @@ GccLT34 = @GccLT34@
GccLT46 = @GccLT46@
CC = $(WhatGccIsCalled)
-CC_STAGE0 = @CC_STAGE0@
+CC_STAGE0 = $(CC)
CC_STAGE1 = $(CC)
CC_STAGE2 = $(CC)
CC_STAGE3 = $(CC)
AS = $(WhatGccIsCalled)
-AS_STAGE0 = @CC_STAGE0@
+AS_STAGE0 = $(AS)
AS_STAGE1 = $(AS)
AS_STAGE2 = $(AS)
AS_STAGE3 = $(AS)
After that, "validate" caused this error:
gcc -E -DMAKING_GHC_BUILD_SYSTEM_DEPENDENCIES
-fno-stack-protector -Werror -Wall
-Icompiler/stage1 -Icompiler/. -Icompiler/parser
...
-Werror=unused-but-set-variable -Wno-error=inline
-MM compiler/ghci/keepCAFsForGHCi.c
-MF compiler/stage1/build/.depend-v.c_asm.bit
cc1: error: -Werror=unused-but-set-variable: No option
-Wunused-but-set-variable
"gcc" is used instead of "gcc47". Note "gcc" is GCC 4.2 which does not
accept -Wunused-but-set-variable.
This is because that CPP is defined independently on --with-gcc. So, I
had to specify CPP to configure:
% config_args="--prefix=/ghc-head
--with-gcc=/usr/local/bin/gcc47
...
CPP=cpp47
THREADS=10 sh validate
Unfortunately, this also caused another error:
"/usr/local/bin/ghc" -optc-Werror -optc-Wall
-optc-isystem'/usr/home/kazu/work/ghc/compiler/stage1'
...
-Wall -XHaskell98 -XNondecreasingIndentation
-XCPP -XPatternGuards
-fwarn-tabs -O -no-user-package-conf -rtsopts
-c ghc/hschooks.c -o ghc/stage1/build/hschooks.o
cc1: error: -Werror=unused-but-set-variable: No option
-Wunused-but-set-variable
Since I don't know how to pass "-pgmc gcc47", I gave up here.
I think that the --with-gcc option for "configure" does not work
well and we need to fix this.
--Kazu
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