Add support for MUSL on Linux

GNUmakefile

@@ -1,4 +1,8 @@
-OS:=	$(shell uname -s | tr '[A-Z]' '[a-z]' | sed 's/darwin/osx/')
+ifdef MUSL
+	OS=linux-musl
+else 
+	OS=$(shell uname -s | tr '[A-Z]' '[a-z]' | sed 's/darwin/osx/')
+endif
 
 all:	magicka
 

deps/jamlib/Makefile.linux-musl

@@ -0,0 +1,29 @@
+CC = cc $(CPPFLAGS) $(CFLAGS) -D__LINUX__ $(LDFLAGS) -Wall
+AR = ar -ru
+RM = rm -f
+
+OBJS = crc32.o mbase.o message.o lastread.o subpack.o structrw.o
+
+jamlib.a : $(OBJS) 
+	$(AR) jamlib.a $(OBJS)
+
+crc32.o:    crc32.c jam.h
+	$(CC) -c crc32.c -o crc32.o
+
+mbase.o:    mbase.c jam.h
+	$(CC) -c mbase.c -o mbase.o -D__MUSL__=1
+
+message.o:  message.c jam.h
+	$(CC) -c message.c -o message.o
+
+lastread.o: lastread.c jam.h
+	$(CC) -c lastread.c -o lastread.o
+
+subpack.o:  subpack.c jam.h
+	$(CC) -c subpack.c -o subpack.o
+
+structrw.o:  structrw.c jam.h
+	$(CC) -c structrw.c -o structrw.o
+
+clean:
+	$(RM) *.o *.a

src/GNUmakefile.common

@@ -89,7 +89,7 @@ magichat:	${JSMN}
 		cd ${UTILSDIR}/magichat && ${MAKE}
 
 filecenter:	${CDK}
-		cd ${UTILSDIR}/filecenter && ${MAKE}
+		cd ${UTILSDIR}/filecenter && ${MAKE} ${FTSLIB}
 
 dosbox_shim:
 		cd ${UTILSDIR}/dosbox_shim && ${MAKE}

src/GNUmakefile.linux-musl

@@ -0,0 +1,13 @@
+CC:=			cc
+CFLAGS:=		-std=gnu99 -I/usr/local/include
+LIBS:=			-L/usr/local/lib -lsqlite3 -lutil -lm -ldl -lssl -lcrypto -lssh -lmosquitto -lfts
+EXTRAOBJS:=     strlcpy/strlcpy.o strlcpy/strlcat.o
+
+LIBTOOLIZE:=    libtoolize
+
+DEPS_LUA_TARGET:=	linux
+DEPS_JAMLIB_MAKEFILE:=	Makefile.linux-musl
+
+FTSLIB:= FTSLIB=1
+
+include GNUmakefile.common

utils/filecenter/Makefile

@@ -23,7 +23,11 @@ endif
 ifeq ($(OS), Linux)
   CC=gcc
   CFLAGS=
+  ifdef FTSLIB
+    LDFLAGS=-lsqlite3 -lncurses -lfts
+  else
     LDFLAGS=-lsqlite3 -lncurses
+  endif
 endif
 ifeq ($(OS), Darwin)
   CC=cc