diff --git a/sc2/ChangeLog b/sc2/ChangeLog
index 4f3a48efd..5c7dd3996 100644
--- a/sc2/ChangeLog
+++ b/sc2/ChangeLog
@@ -1,4 +1,7 @@
 Changes towards version 0.7:
+- Added support to the unix build system for explicitely specifying the name
+  of the define to set to show when a symbol is found.
+  Also a fix for when 'strcasecmp' is #define'd by the system. - SvdB
 - Rewrote mapres.c to use uio's hashtables instead of its own
   association lists - Michael
 - Added a Remix option to the setup menu - Michael
@@ -46,7 +49,7 @@ Changes towards version 0.7:
 - Fixed some Melnorme history info timestamps - Alex
 - Fixed Ur-Quan story timestamps, from Vlad-Ceru Opran
 - Removed the 256-frame limit on .ani files - Michael
-- Renamed PlaySpeeh/StopSpeech to work around name collisions
+- Renamed PlaySpeech/StopSpeech to work around name collisions
   on OSX - Alex
 - Ending the battle with a simultaneous death no longer triggers an
   assertion - SvdB
diff --git a/sc2/build/unix/build.config b/sc2/build/unix/build.config
index 0f5c87159..0e2697865 100644
--- a/sc2/build/unix/build.config
+++ b/sc2/build/unix/build.config
@@ -32,11 +32,18 @@ uqm_requirements()
 
 
 	# Add defines for HAVE_READDIR_R, HAVE_SETENV, HAVE_STRUPR,
-	# and HAVE_STRICMP
+	# HAVE_STRCASECMP, and HAVE_STRICMP
 	define_have_symbol readdir_r
 	define_have_symbol setenv
 	define_have_symbol strupr
+	define_have_symbol strcasecmp
 	define_have_symbol stricmp
+
+	# Require either strcasecmp or stricmp.
+	if not have_symbol strcasecmp && not have_symbol stricmp; then
+		echo "Fatal: Your system defines neither strcasecmp() nor stricmp()."
+		exit 1
+	fi
 	
 	# Add defines for HAVE_ISWGRAPH, HAVE_WCHAR_T, and HAVE_WINT_T
 	define_have_symbol iswgraph
@@ -191,13 +198,13 @@ uqm_prepare_config()
 		OGGVORBIS=tremor
 		use_library tremor
 	}
-	CHOICE_ovcodec_DEFAULT=standard
 	CHOICE_ovcodec_OPTION_none_TITLE="No Ogg Vorbis support"
 	CHOICE_ovcodec_OPTION_none_ACTION=ovcodec_none_action
 	ovcodec_none_action() {
 		CFLAGS="$CFLAGS -DOVCODEC_NONE"
 		OGGVORBIS=none
 	}
+	CHOICE_ovcodec_DEFAULT=standard
 
 	CHOICE_mikmod_OPTIONS="internal external"
 	CHOICE_mikmod_TITLE="Tracker music support"
diff --git a/sc2/build/unix/config_functions b/sc2/build/unix/config_functions
index cee17ac87..a34aa623c 100644
--- a/sc2/build/unix/config_functions
+++ b/sc2/build/unix/config_functions
@@ -586,9 +586,14 @@ EOF
 # Description: check if a symbol is defined.
 # Arguments:   $1 - the name of the symbol
 have_symbol() {
-	local SYMBOL CODE
+	local SYMBOL TEMP_PRESENT CODE
 	SYMBOL="$1"
 
+	TEMP_PRESENT=`getVar SYMBOL_${SYMBOL}_PRESENT`
+	if [ -n "$TEMP_PRESENT" ]; then
+		return "$TEMP_PRESENT"
+	fi
+
 	CODE=`cat << EOF	
 int main(void) {
 	(void) $SYMBOL;
@@ -600,17 +605,24 @@ EOF
 	have_symbol_generic "$SYMBOL" "$CODE"
 	if [ $? -gt 0 ]; then
 		build_message "Symbol '$SYMBOL' not found."
+		eval "SYMBOL_${SYMBOL}_PRESENT"=1
 		return 1
 	fi
 	build_message "Symbol '$SYMBOL' found."
+	eval "SYMBOL_${SYMBOL}_PRESENT"=0
 	return 0
 }
 
 # Description: check if a type is present.
 # Arguments:   $1 - the name of the symbol
 have_type() {
-	local TYPE
+	local TYPE TEMP_PRESENT CODE
 	TYPE="$1"
+	
+	TEMP_PRESENT=`getVar TYPE_${TYPE}_PRESENT`
+	if [ -n "$TEMP_PRESENT" ]; then
+		return "$TEMP_PRESENT"
+	fi
 
 	CODE=`cat << EOF	
 int main(void) {
@@ -619,14 +631,16 @@ int main(void) {
 	return 0;
 }
 EOF
-`
+			`
 
 	have_symbol_generic "$TYPE" "$CODE"
 	if [ $? -gt 0 ]; then
 		build_message "Type '$TYPE' not found."
+		eval "TYPE_${TYPE}_PRESENT"=1
 		return 1
 	fi
 	build_message "Type '$TYPE' found."
+	eval "TYPE_${TYPE}_PRESENT"=0
 	return 0
 }
 
@@ -635,20 +649,26 @@ EOF
 #              name of the symbol.
 # Arguments:   $1 - the name of the symbol
 define_have_symbol() {
-	local NAME VALUE
+	local NAME VALUE DEFNAME
 
-	# Why not "tr [:lower:] [:upper:]"? Because the capital "i" is not
-	# "I" in Turkish... An alternative would be setting LC_CTYPE to POSIX.
-	NAME=`$TR "abcdefghijklmnopqrstuvwxyz" "ABCDEFGHIJKLMNOPQRSTUVWXYZ" << EOF
+	DEFNAME=`getVar SYMBOL_${1}_DEFNAME`
+	if [ -z "$DEFNAME" ]; then
+		# Why not "tr [:lower:] [:upper:]"? Because the capital "i" is not
+		# "I" in Turkish... An alternative would be setting LC_CTYPE to POSIX.
+		NAME=`$TR "abcdefghijklmnopqrstuvwxyz" "ABCDEFGHIJKLMNOPQRSTUVWXYZ" \
+				<< EOF
 $1
 EOF
-`
+				`
+		DEFNAME="HAVE_$NAME"
+	fi
+
 	if have_symbol "$1"; then
-		add_symbol "HAVE_$NAME" "#define HAVE_$NAME"
-		add_symbol "HAVE_${NAME}_FLAG" 1
+		add_symbol "$DEFNAME" "#define $DEFNAME"
+		add_symbol "${DEFNAME}_FLAG" 1
 	else
-		add_symbol "HAVE_$NAME" "#undef HAVE_$NAME"
-		add_symbol "HAVE_${NAME}_FLAG" 0
+		add_symbol "$DEFNAME" "#undef $DEFNAME"
+		add_symbol "${DEFNAME}_FLAG" 0
 	fi
 }
 
@@ -657,20 +677,26 @@ EOF
 #              name of the symbol.
 # Arguments:   $1 - the name of the symbol
 define_have_type() {
-	local NAME VALUE
+	local NAME VALUE DEFNAME
 
-	# Why not "tr [:lower:] [:upper:]"? Because the capital "i" is not
-	# "I" in Turkish... An alternative would be setting LC_CTYPE to POSIX.
-	NAME=`$TR "abcdefghijklmnopqrstuvwxyz" "ABCDEFGHIJKLMNOPQRSTUVWXYZ" << EOF
+	DEFNAME=`getVar TYPE_${1}_DEFNAME`
+	if [ -z "$DEFNAME" ]; then
+		# Why not "tr [:lower:] [:upper:]"? Because the capital "i" is not
+		# "I" in Turkish... An alternative would be setting LC_CTYPE to POSIX.
+		NAME=`$TR "abcdefghijklmnopqrstuvwxyz" "ABCDEFGHIJKLMNOPQRSTUVWXYZ" \
+				<< EOF
 $1
 EOF
-`
+				`
+		DEFNAME="HAVE_$NAME"
+	fi
+
 	if have_type "$1"; then
-		add_symbol "HAVE_$NAME" "#define HAVE_$NAME"
-		add_symbol "HAVE_${NAME}_FLAG" 1
+		add_symbol "$DEFNAME" "#define $DEFNAME"
+		add_symbol "${DEFNAME}_FLAG" 1
 	else
-		add_symbol "HAVE_$NAME" "#undef HAVE_$NAME"
-		add_symbol "HAVE_${NAME}_FLAG" 0
+		add_symbol "$DEFNAME" "#undef $DEFNAME"
+		add_symbol "${DEFNAME}_FLAG" 0
 	fi
 }
 
@@ -703,20 +729,26 @@ EOF
 #              name of the header file. "sys/time.h" becomes "SYS_TIME_H".
 # Arguments:   $1 - the name of the header file
 define_have_header() {
-	local NAME VALUE
+	local NAME VALUE DEFNAME
 	
-	# Why not "tr [:lower:] [:upper:]"? Because the capital "i" is not
-	# "I" in Turkish... An alternative would be setting LC_CTYPE to POSIX.
-	NAME=`$TR "/.abcdefghijklmnopqrstuvwxyz" "__ABCDEFGHIJKLMNOPQRSTUVWXYZ" << EOF
+	DEFNAME=`getVar HEADER_${1%.h}_DEFNAME`
+	if [ -z "$DEFNAME" ]; then
+		# Why not "tr [:lower:] [:upper:]"? Because the capital "i" is not
+		# "I" in Turkish... An alternative would be setting LC_CTYPE to POSIX.
+		NAME=`$TR "/.abcdefghijklmnopqrstuvwxyz" \
+				"__ABCDEFGHIJKLMNOPQRSTUVWXYZ" << EOF
 $1
 EOF
-`
+				`
+		DEFNAME="HAVE_$NAME"
+	fi
+
 	if have_header "$1"; then
-		add_symbol "HAVE_$NAME" "#define HAVE_$NAME"
-		add_symbol "HAVE_${NAME}_FLAG" 1
+		add_symbol "$DEFNAME" "#define $DEFNAME"
+		add_symbol "${DEFNAME}_FLAG" 1
 	else
-		add_symbol "HAVE_$NAME" "#undef HAVE_$NAME"
-		add_symbol "HAVE_${NAME}_FLAG" 0
+		add_symbol "$DEFNAME" "#undef $DEFNAME"
+		add_symbol "${DEFNAME}_FLAG" 0
 	fi
 }
 
diff --git a/sc2/build/unix/config_proginfo_host b/sc2/build/unix/config_proginfo_host
index 2613c656a..d47d7e2b1 100644
--- a/sc2/build/unix/config_proginfo_host
+++ b/sc2/build/unix/config_proginfo_host
@@ -243,6 +243,10 @@ SYMBOL_readdir_r_EXTRA="#include <dirent.h>"
 
 SYMBOL_setenv_EXTRA="#include <stdlib.h>"
 
+SYMBOL_strcasecmp_EXTRA="#include <string.h>"
+SYMBOL_strcasecmp_DEFNAME="HAVE_STRCASECMP_UQM"
+		# HAVE_STRCASECMP would conflict with SDL (SDL_config.h).
+
 SYMBOL_stricmp_EXTRA="#include <string.h>"
 
 SYMBOL_strupr_EXTRA="#include <string.h>"
diff --git a/sc2/src/config_unix.h.in b/sc2/src/config_unix.h.in
index c8f0480f6..b82dff256 100644
--- a/sc2/src/config_unix.h.in
+++ b/sc2/src/config_unix.h.in
@@ -37,6 +37,10 @@
 /* Defined if your system has strupr of its own */
 @HAVE_STRUPR@
 
+/* Defined if your system has strcasecmp of its own */
+@HAVE_STRCASECMP_UQM@
+		// Not using "HAVE_STRCASECMP" as that conflicts with SDL.
+
 /* Defined if your system has stricmp of its own */
 @HAVE_STRICMP@
 
diff --git a/sc2/src/config_win.h.in b/sc2/src/config_win.h.in
index 31d154a9b..1e7694939 100644
--- a/sc2/src/config_win.h.in
+++ b/sc2/src/config_win.h.in
@@ -38,6 +38,10 @@
 /* Defined if your system has strupr of its own */
 @HAVE_STRUPR@
 
+/* Defined if your system has strcasecmp of its own */
+@HAVE_STRCASECMP_UQM@
+		// Not using "HAVE_STRCASECMP" as that conflicts with SDL.
+
 /* Defined if your system has stricmp of its own */
 @HAVE_STRICMP@
 
diff --git a/sc2/src/msvc++/config.h b/sc2/src/msvc++/config.h
index 177e12b54..660b8bc58 100644
--- a/sc2/src/msvc++/config.h
+++ b/sc2/src/msvc++/config.h
@@ -38,6 +38,10 @@
 /* Defined if your system has strupr of its own */
 #define HAVE_STRUPR
 
+/* Defined if your system has strcasecmp of its own */
+#undef HAVE_STRCASECMP_UQM
+		// Not using "HAVE_STRCASECMP" as that conflicts with SDL.
+
 /* Defined if your system has stricmp of its own */
 #define HAVE_STRICMP
 
diff --git a/sc2/src/port.h b/sc2/src/port.h
index 5fbe75bbf..cbb50f87a 100644
--- a/sc2/src/port.h
+++ b/sc2/src/port.h
@@ -45,12 +45,20 @@
 #	include <unistd.h>
 #endif
 
-#ifndef HAVE_STRICMP
+// Using "HAVE_STRCASECMP_UQM" instead of "HAVE_STRCASECMP" as the latter
+// conflicts with SDL.
+#if !defined(HAVE_STRICMP) && !defined(HAVE_STRCASECMP_UQM)
+#	error Neither stricmp() nor strcasecmp() is available.
+#elif defined(HAVE_STRCASECMP_UQM)
 #	define stricmp strcasecmp
-#else
+#elif defined(HAVE_STRICMP)
 #	define strcasecmp stricmp
+#else
+	// We should take care not to define anything if both strcasecmp() and
+	// stricmp() are defined, as one might exist as a macro to the other.
 #endif
 
+
 #ifndef HAVE_STRUPR
 char *strupr (char *str);
 #endif