add support for vxbuild-cross build system

csrc/lanes/build-linux32.sh

@@ -0,0 +1 @@
+P=linux32 C="-m32 -fPIC" L="-m32 -s -static-libgcc -pthread" D=core.so A=liblanes_core.a ./build.sh

csrc/lanes/build-linux64.sh

@@ -1 +1 @@
-P=linux64 C=-fPIC L="-s -static-libgcc -pthread" D=core.so A=liblanes_core.a ./build.sh
+P=linux64 C="-fPIC" L="-s -static-libgcc -pthread" D=core.so A=liblanes_core.a ./build.sh

csrc/lanes/build-mingw32.sh

@@ -0,0 +1,3 @@
+[ `uname` = Linux ] && { export X=i686-w64-mingw32-; }
+P=mingw32 C="-DWINVER=0x0501 -D_WIN32_WINNT=0x0501 -fPIC" \
+	L="-s -static-libgcc ../../bin/$P/luajit.a" D=core.dll A=lanes_core.a ./build.sh

csrc/lanes/build-mingw64.sh

@@ -1,2 +1,3 @@
-P=mingw64 C="-DWINVER=0x0501 -D_WIN32_WINNT=0x0501" \
-	L="-s -static-libgcc -llua51" D=core.dll A=lanes_core.a ./build.sh
+[ `uname` = Linux ] && { export X=x86_64-w64-mingw32-; }
+P=mingw64 C="-DWINVER=0x0501 -D_WIN32_WINNT=0x0501 -fPIC" \
+	L="-s -static-libgcc ../../bin/$P/luajit.a" D=core.dll A=lanes_core.a ./build.sh

csrc/lanes/build-osx64.sh

@@ -1,3 +1,3 @@
-[ `uname` = Linux ] && export X=x86_64-apple-darwin11-
-P=osx64 C="-arch x86_64" L="-arch x86_64 -undefined dynamic_lookup" \
+[ `uname` = Linux ] && { export X=x86_64-apple-darwin19-; export CC=clang; }
+P=osx64 C="-arch x86_64 -fPIC" L="-arch x86_64 -undefined dynamic_lookup" \
 	D=core.so A=liblanes_core.a ./build.sh

csrc/lanes/build.sh

@@ -1,6 +1,7 @@
+[ "$CC" ] || CC=gcc
 mkdir -p ../../bin/$P/clib/lanes
-${X}gcc -c -O2 $C src/*.c -I../lua-headers -DNDEBUG
-${X}gcc *.o -shared -o ../../bin/$P/clib/lanes/$D -L../../bin/$P $L
+${X}${CC} -c -O2 $C src/*.c -I../lua-headers -DNDEBUG
+${X}${CC} *.o -shared -o ../../bin/$P/clib/lanes/$D -L../../bin/$P $L
 rm -f      ../../bin/$P/$A
 ${X}ar rcs ../../bin/$P/$A *.o
 rm *.o