[creduce-bugs] [PATCH] creduce build system can cause bogus cflags settings, causing the build to fail

[Bernhard Rosenkraenzer <bero@lindev.ch>]

Hi,
if LLVM is built with an option like -Werror=format-security, creduce's 
autoconf scripts and Makefiles break the build.

The problem is in m4/ax_llvm.m4:
LLVM_CPPFLAGS=`$LLVM_CONFIG --cxxflags | sed -e 's/-Werror//' | sed -e 
's/-pedantic//'`

and in clang_delta/Makefile.am:
LLVMCXXFLAGS      := $(shell "$(LLVM_CONFIG)" --cxxflags | sed -e 
's/-Werror//')

-Werror gets removed, leaving =format-security, which isn't a valid 
compiler option -- causing the build to fail.

The attached patch should fix it.

ttyl
bero

--- creduce-2.3.0/clang_delta/Makefile.am.omv~	2015-06-07 14:33:02.530909700 +0200
+++ creduce-2.3.0/clang_delta/Makefile.am	2015-06-07 14:33:02.533909685 +0200
@@ -19,7 +19,7 @@ GIT_FLAG = -DGIT_VERSION=\"$(GIT_HASH)\"
 # Avoid the warning by making `--ldflags' and `--libs' not look like
 # linker options.
 #
-LLVMCXXFLAGS	:= $(shell "$(LLVM_CONFIG)" --cxxflags | sed -e 's/-Werror//') \
+LLVMCXXFLAGS	:= $(shell "$(LLVM_CONFIG)" --cxxflags | sed -e 's/-Werror[ $]//') \
                    -fno-rtti -fno-exceptions
 LLVMLDFLAGS	:= $(shell "$(LLVM_CONFIG)" \--ldflags)
 LLVMINCLUDEDIR	:= $(shell "$(LLVM_CONFIG)" --includedir)
--- creduce-2.3.0/m4/ax_llvm.m4.omv~	2015-06-07 14:31:01.381395621 +0200
+++ creduce-2.3.0/m4/ax_llvm.m4	2015-06-07 14:33:02.562909531 +0200
@@ -74,7 +74,7 @@ AC_DEFUN([AX_LLVM],
   fi
   
   LLVM_BINDIR=`$LLVM_CONFIG --bindir`
-  LLVM_CPPFLAGS=`$LLVM_CONFIG --cxxflags | sed -e 's/-Werror//' | sed -e 's/-pedantic//'`
+  LLVM_CPPFLAGS=`$LLVM_CONFIG --cxxflags | sed -e 's/-Werror[ $]//' | sed -e 's/-pedantic//'`
   LLVM_LDFLAGS="`$LLVM_CONFIG --ldflags` $LLVM_SYSLIBS"
   LLVM_LIBS=`$LLVM_CONFIG --libs $2`