# HG changeset patch
# User truelight <truelight@openttd.org>
# Date 1171915159 0
# Node ID 31245c7b2e3766775e8f8efee6bd46f266589892
# Parent  afd5b37694a29b5bd2ce4aae3ac26d6dd220af39
(svn r8814) [Config] -Add: added --awk and detect_awk. We now try to find an awk on the user system which allows gsub(). If not found, you can define one yourself, or it tells you versions you might want to install

diff --git a/Makefile.in b/Makefile.in
--- a/Makefile.in
+++ b/Makefile.in
@@ -30,6 +30,7 @@
 OS = !!OS!!
 OSXAPP = !!OSXAPP!!
 REVISION = !!REVISION!!
+AWK = !!AWK!!
 
 RES := $(shell if ! [ -f $(CONFIG_CACHE_SOURCE_LIST) ] || [ -n "`cmp $(CONFIG_CACHE_SOURCE_LIST) $(SOURCE_LIST)`" ]; then cp $(SOURCE_LIST) $(CONFIG_CACHE_SOURCE_LIST); fi )
 
@@ -118,7 +119,7 @@
 # Find if the local source if modified
 REV_MODIFIED := $(shell svnversion $(SRC_DIR) | sed -n 's/.*\(M\).*/\1/p' )
 # Find the revision like: rXXXX-branch
-REV := $(shell LC_ALL=C svn info $(SRC_DIR) | awk '/^URL:.*branches/ { split($$2, a, "/"); BRANCH="-"a[5] } /^Last Changed Rev:/ { REV="r"$$4"$(REV_MODIFIED)" } END { print REV BRANCH }')
+REV := $(shell LC_ALL=C svn info $(SRC_DIR) | $(AWK) '/^URL:.*branches/ { split($$2, a, "/"); BRANCH="-"a[5] } /^Last Changed Rev:/ { REV="r"$$4"$(REV_MODIFIED)" } END { print REV BRANCH }')
 endif
 endif
 # Make sure we have something in REV
diff --git a/Makefile.src.in b/Makefile.src.in
--- a/Makefile.src.in
+++ b/Makefile.src.in
@@ -27,6 +27,7 @@
 CFLAGS_MAKEDEP= !!CFLAGS_MAKEDEP!!
 SORT         = !!SORT!!
 REVISION     = !!REVISION!!
+AWK          = !!AWK!!
 CONFIG_CACHE_COMPILER = $(SRC_OBJS_DIR)/!!CONFIG_CACHE_COMPILER!!
 CONFIG_CACHE_LINKER   = $(SRC_OBJS_DIR)/!!CONFIG_CACHE_LINKER!!
 CONFIG_CACHE_ENDIAN   = $(SRC_OBJS_DIR)/!!CONFIG_CACHE_ENDIAN!!
@@ -82,7 +83,7 @@
 # Find if the local source if modified
 REV_MODIFIED := $(shell svnversion $(SRC_DIR) | sed -n 's/.*\(M\).*/\1/p' )
 # Find the revision like: rXXXX-branch
-REV := $(shell LC_ALL=C svn info $(SRC_DIR) | awk '/^URL:.*branch/ { split($$2, a, "/"); BRANCH="-"a[5] } /^Last Changed Rev:/ { REV="r"$$4"$(REV_MODIFIED)" } END { print REV BRANCH }')
+REV := $(shell LC_ALL=C svn info $(SRC_DIR) | $(AWK) '/^URL:.*branch/ { split($$2, a, "/"); BRANCH="-"a[5] } /^Last Changed Rev:/ { REV="r"$$4"$(REV_MODIFIED)" } END { print REV BRANCH }')
 endif
 endif
 # Make sure we have something in REV
@@ -166,7 +167,7 @@
 
 # Remove all comments and includes that don't start with $(SRC_DIR)
 # Remove $(SRC_DIR) from object-file-name
-	@awk '                              \
+	@$(AWK) '                           \
 	/^# DO NOT/ { print $$0 ; next}     \
 	/^#/ {next}                         \
 	/:/ {                               \
diff --git a/config.lib b/config.lib
--- a/config.lib
+++ b/config.lib
@@ -17,6 +17,7 @@
 	windres=""
 	strip=""
 	lipo=""
+	awk="awk"
 	os="DETECT"
 	endian="AUTO"
 	revision=""
@@ -57,7 +58,7 @@
 	with_fontconfig="1"
 	with_psp_config="1"
 
-	save_params_array="build host cc_build cc_host cxx_build cxx_host windres strip lipo os revision endian config_log prefix_dir binary_dir data_dir icon_dir personal_dir install_dir custom_lang_dir second_data_dir enable_install enable_debug enable_profiling enable_dedicated enable_network enable_static enable_translator enable_assert enable_strip with_osx_sysroot enable_universal enable_osx_g5 with_application_bundle with_sdl with_cocoa with_zlib with_png with_makedepend with_direct_music with_sort with_iconv with_midi with_midi_arg with_libtimidity with_freetype with_fontconfig with_psp_config CC CXX CFLAGS LDFLAGS"
+	save_params_array="build host cc_build cc_host cxx_build cxx_host windres strip awk lipo os revision endian config_log prefix_dir binary_dir data_dir icon_dir personal_dir install_dir custom_lang_dir second_data_dir enable_install enable_debug enable_profiling enable_dedicated enable_network enable_static enable_translator enable_assert enable_strip with_osx_sysroot enable_universal enable_osx_g5 with_application_bundle with_sdl with_cocoa with_zlib with_png with_makedepend with_direct_music with_sort with_iconv with_midi with_midi_arg with_libtimidity with_freetype with_fontconfig with_psp_config CC CXX CFLAGS LDFLAGS"
 }
 
 detect_params() {
@@ -99,6 +100,8 @@
 			--cxx-host=*)                 cxx_host="$optarg";;
 			--windres)                    prevp_p="windres";;
 			--windres=*)                  windres="$optarg";;
+			--awk)                        prevp_p="awk";;
+			--awk=*)                      awk="$optarg";;
 			--strip)                      prevp_p="strip";;
 			--strip=*)                    strip="$optarg";;
 			--lipo)                       prevp_p="lipo";;
@@ -309,6 +312,8 @@
 		exit 1
 	fi
 
+	detect_awk
+
 	check_build
 	check_host
 
@@ -1139,12 +1144,51 @@
 	log 1 "checking makedepend... $makedepend"
 }
 
+detect_awk() {
+	# Not all awks allow gsub(), so we test for that here! It is in fact all we need...
+
+	# These awks are known to work. Test for them explicit
+	awks="gawk mawk nawk"
+
+	awk_prefix="echo \"a.c b.c c.c\" | tr ' ' \\\\n | "
+	awk_param="' { ORS = \" \" } /\.c$/   { gsub(\".c$\",   \".o\", \$0); print \$0; }' 2>/dev/null"
+	awk_result="a.o b.o c.o "
+	log 2 "Detecing awk..."
+
+	log 2 "Trying: $awk_prefix $awk $awk_param"
+	res=`eval $awk_prefix $awk $awk_param`
+	log 2 "Result: '$res'"
+	if [ "$res" != "$awk_result" ] && [ "$awk" = "awk" ]; then
+		# User didn't supply his own awk, so try to detect some other known working names for an awk
+		for awk in $awks; do
+			log 2 "Trying: $awk_prefix $awk $awk_param"
+			res=`eval $awk_prefix $awk $awk_param`
+			log 2 "Result: '$res'"
+			if [ "$res" = "$awk_result" ]; then break; fi
+		done
+
+		if [ "$res" != "$awk_result" ]; then
+			log 1 "checking awk... not found"
+			log 1 "configure: error: no awk found"
+			log 1 "configure: error: please install one of the following: $awks"
+			exit 1
+		fi
+	fi
+	if [ "$res" != "$awk_result" ]; then
+		log 1 "checking awk... not found"
+		log 1 "configure: error: you supplied '$awk' but it doesn't seem a valid gawk or mawk"
+		exit 1
+	fi
+
+	log 1 "checking awk... $awk"
+}
+
 detect_os() {
 	if [ "$os" = "DETECT" ]; then
 		# Detect UNIX, OSX, FREEBSD, MORPHOS, BEOS, SUNOS, CYGWIN, MINGW, OS2, WINCE, and PSP
 
 		# Try first via dumpmachine, then via uname
-		os=`echo "$host" | tr '[A-Z]' '[a-z]' | awk '
+		os=`echo "$host" | tr '[A-Z]' '[a-z]' | $awk '
 					/linux/        { print "UNIX";    exit}
 					/darwin/       { print "OSX";     exit}
 					/freebsd/      { print "FREEBSD"; exit}
@@ -1159,7 +1203,7 @@
 		'`
 
 		if [ -z "$os" ]; then
-			os=`LC_ALL=C uname | tr '[A-Z]' '[a-z]' | awk '
+			os=`LC_ALL=C uname | tr '[A-Z]' '[a-z]' | $awk '
 					/linux/        { print "UNIX";    exit}
 					/darwin/       { print "OSX";     exit}
 					/freebsd/      { print "FREEBSD"; exit}
@@ -1754,6 +1798,7 @@
 		s#!!OS!!#$os#g;
 		s#!!CONFIGURE_FILES!!#$CONFIGURE_FILES#g;
 		s#!!REVISION!!#$revision#g;
+		s#!!AWK!!#$awk#g;
 		s#!!ENABLE_INSTALL!!#$enable_install#g;
 	"
 }
@@ -1850,6 +1895,7 @@
 	echo "                                 on HOST [BUILD]"
 	echo "  --windres=WINDRES              the windres to use [HOST-windres]"
 	echo "  --strip=STRIP                  the strip to use [HOST-strip]"
+	echo "  --awk=AWK                      the awk to use in configure [awk]"
 	echo "  --lipo=LIPO                    the lipo to use (OSX ONLY) [HOST-lipo]"
 	echo "  --os=OS                        the OS we are compiling for [DETECT]"
 	echo "                                 DETECT/UNIX/OSX/FREEBSD/MORPHOS/BEOS/"
diff --git a/configure b/configure
--- a/configure
+++ b/configure
@@ -58,7 +58,7 @@
 fi
 
 # Read the source.list and process it
-SRCS="`< $ROOT_DIR/source.list tr '\r' '\n' | awk '
+SRCS="`< $ROOT_DIR/source.list tr '\r' '\n' | $awk '
 	{  }
 	/^(	*)#end/  { if (deep == skip) { skip -= 1; } deep -= 1; next; }
 	/^(	*)#else/ { if (deep == skip) { skip -= 1; } else if (deep - 1 == skip) { skip += 1; } next; }
@@ -100,11 +100,11 @@
 	}
 ' | $PIPE_SORT`"
 
-OBJS_C="`  echo \"$SRCS\" | awk ' { ORS = " " } /\.c$/   { gsub(".c$",   ".o", $0); print $0; }'`"
-OBJS_CPP="`echo \"$SRCS\" | awk ' { ORS = " " } /\.cpp$/ { gsub(".cpp$", ".o", $0); print $0; }'`"
-OBJS_MM="` echo \"$SRCS\" | awk ' { ORS = " " } /\.mm$/  { gsub(".mm$",  ".o", $0); print $0; }'`"
-OBJS_RC="` echo \"$SRCS\" | awk ' { ORS = " " } /\.rc$/  { gsub(".rc$",  ".o", $0); print $0; }'`"
-SRCS="`    echo \"$SRCS\" | awk ' { ORS = " " } { print $0; }'`"
+OBJS_C="`  echo \"$SRCS\" | $awk ' { ORS = " " } /\.c$/   { gsub(".c$",   ".o", $0); print $0; }'`"
+OBJS_CPP="`echo \"$SRCS\" | $awk ' { ORS = " " } /\.cpp$/ { gsub(".cpp$", ".o", $0); print $0; }'`"
+OBJS_MM="` echo \"$SRCS\" | $awk ' { ORS = " " } /\.mm$/  { gsub(".mm$",  ".o", $0); print $0; }'`"
+OBJS_RC="` echo \"$SRCS\" | $awk ' { ORS = " " } /\.rc$/  { gsub(".rc$",  ".o", $0); print $0; }'`"
+SRCS="`    echo \"$SRCS\" | $awk ' { ORS = " " } { print $0; }'`"
 
 # In makefiles, we always use -u for sort
 if [ -z "$sort" ]; then