libretro, fix for windows and osx

diff --git a/tools/mkoffsets.sh b/tools/mkoffsets.sh
index 8a1092e..d890fc0 100755 (executable)
--- a/tools/mkoffsets.sh
+++ b/tools/mkoffsets.sh
@@ -46,14 +46,22 @@ get_define () # prefix struct member member...
        line=$(printf "#define %-20s 0x%04x" $prefix$name $rodata)
 }
 
+fn="${1:-.}/pico_int_offs.h"
 if echo $CFLAGS | grep -qe -flto; then CFLAGS="$CFLAGS -fno-lto"; fi
+
+# don't do this if readelf isn't available. it doesn't matter since offsets are
+# only needed for the asm parts (currently mips/arm32) and those have readelf
+if ! command -v readelf >/dev/null; then
+       echo "/* mkoffset.sh: readelf not found, offset table not created */" >$fn
+       echo "WARNING: readelf not found, offset table not created"
+       exit
+fi
 # determine endianess
 echo '#include <stdint.h>' >/tmp/getoffs.c
 echo "const int32_t val = 1;" >>/tmp/getoffs.c
 compile_rodata
 ENDIAN=$(if [ "$rodata" -eq 1 ]; then echo be; else echo le; fi)
 # output header
-fn="${1:-.}/pico_int_offs.h"
 echo "/* autogenerated by mkoffset.sh, do not edit */" >$fn
 echo "/* target endianess: $ENDIAN, compiled with: $CC $CFLAGS */" >>$fn
 # output offsets