[build] use -pipe with gcc and clang

SConstruct

@@ -291,7 +291,7 @@ env['package'] = package
 env['version'] = version
 if env['CC'] == 'gcc':
 	## we need x-open 6 and bsd 4.3 features
-	env.Append(CCFLAGS = Split('-Wall -O2 -g -W -pedantic -Wunused -Wshadow -std=gnu99'))
+	env.Append(CCFLAGS = Split('-pipe -Wall -O2 -g -W -pedantic -Wunused -Wshadow -std=gnu99'))
 
 env.Append(CPPFLAGS = [
 	'-D_FILE_OFFSET_BITS=64',

configure.ac

@@ -1636,7 +1636,7 @@ fi
 AC_MSG_NOTICE([----------------------------------------])
 dnl check for extra compiler options (warning options)
 if test "${GCC}" = yes; then
-  TRY_CFLAGS([-Wall -W -Wshadow -pedantic])
+  TRY_CFLAGS([-pipe -Wall -W -Wshadow -pedantic])
 fi
 
 AC_ARG_ENABLE([extra-warnings],

src/CMakeLists.txt

@@ -1114,7 +1114,7 @@ if(HAVE_XXHASH)
 endif()
 
 if(CMAKE_C_COMPILER_ID MATCHES "GNU" OR CMAKE_C_COMPILER_ID MATCHES "Clang")
-	set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -std=gnu99 -Wall -g -Wshadow -W -pedantic ${WARN_CFLAGS}")
+	set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -std=gnu99 -pipe -Wall -g -Wshadow -W -pedantic ${WARN_CFLAGS}")
 	set(CMAKE_C_FLAGS_RELEASE        "${CMAKE_C_FLAGS_RELEASE}     -O2")
 	set(CMAKE_C_FLAGS_DEBUG          "${CMAKE_C_FLAGS_DEBUG}       -O0")
 	set(CMAKE_C_FLAGS_RELWITHDEBINFO "${CMAKE_C_FLAGS_WITHDEBINFO} -O2")

src/meson.build

@@ -786,6 +786,7 @@ common_cflags = defs + [
 
 if compiler.get_id() == 'gcc' or compiler.get_id() == 'clang'
 	common_cflags += [
+		'-pipe',
 		'-Wall',
 		'-g',
 		'-Wshadow',