https://gcc.gnu.org/bugzilla/show_bug.cgi?id=57583
--- Comment #11 from John Paul Adrian Glaubitz <glaubitz at physik dot fu-berlin.de> --- Ok, the patch does indeed work. Tested by compiling the offending source code file in mednafen which currently fails to build from source [1]: Without "-mlong-jump-table-offsets", I get: (sid-m68k-sbuild)root@ikarus:/tmp/mednafen-0.9.39.2+dfsg/src/hw_cpu/m68k# g++-7 -c -std=c++11 m68k.cpp -o m68k.o -I../../../include -DMSB_FIRST -DSIZEOF_DOUBLE=8 (...) /tmp/cclNgtni.s:2848: Error: Adjusted signed .word (0x22374) overflows: `switch'-statement too large. /tmp/cclNgtni.s:2848: Error: Adjusted signed .word (0x22374) overflows: `switch'-statement too large. /tmp/cclNgtni.s:2848: Error: Adjusted signed .word (0x22374) overflows: `switch'-statement too large. /tmp/cclNgtni.s:2848: Error: Adjusted signed .word (0x22374) overflows: `switch'-statement too large. /tmp/cclNgtni.s:2848: Error: Adjusted signed .word (0x22374) overflows: `switch'-statement too large. /tmp/cclNgtni.s:2848: Error: Adjusted signed .word (0x22374) overflows: `switch'-statement too large. /tmp/cclNgtni.s:2848: Error: Adjusted signed .word (0x2237a) overflows: `switch'-statement too large. /tmp/cclNgtni.s:2848: Error: Adjusted signed .word (0x2237a) overflows: `switch'-statement too large. /tmp/cclNgtni.s:2848: Error: Adjusted signed .word (0x2237a) overflows: `switch'-statement too large. /tmp/cclNgtni.s:2848: Error: Adjusted signed .word (0x2237a) overflows: `switch'-statement too large. /tmp/cclNgtni.s:2848: Error: Adjusted signed .word (0x2237a) overflows: `switch'-statement too large. /tmp/cclNgtni.s:2848: Error: Adjusted signed .word (0x2237a) overflows: `switch'-statement too large. /tmp/cclNgtni.s:2848: Error: Adjusted signed .word (0x2237a) overflows: `switch'-statement too large. /tmp/cclNgtni.s:2848: Error: Adjusted signed .word (0x2237a) overflows: `switch'-statement too large. (sid-m68k-sbuild)root@ikarus:/tmp/mednafen-0.9.39.2+dfsg/src/hw_cpu/m68k# With the option set, it works: (sid-m68k-sbuild)root@ikarus:/tmp/mednafen-0.9.39.2+dfsg/src/hw_cpu/m68k# g++-7 -c -std=c++11 m68k.cpp -mlong-jump-table-offsets -o m68k.o -I../../../include -DMSB_FIRST -DSIZEOF_DOUBLE=8 (sid-m68k-sbuild)root@ikarus:/tmp/mednafen-0.9.39.2+dfsg/src/hw_cpu/m68k# ls -l total 4100 -rw-r--r-- 1 glaubitz glaubitz 21029 Jul 31 19:22 gen.cpp -rw-r--r-- 1 glaubitz glaubitz 41754 Aug 23 05:26 m68k.cpp -rw-r--r-- 1 glaubitz glaubitz 11780 Aug 22 22:13 m68k.h -rw-r--r-- 1 root root 3242396 Jan 6 10:18 m68k.o -rw-r--r-- 1 glaubitz glaubitz 868437 Jul 31 19:22 m68k_instr.inc (sid-m68k-sbuild)root@ikarus:/tmp/mednafen-0.9.39.2+dfsg/src/hw_cpu/m68k# Anything that speaks against applying this patch against gcc-7 and gcc-6? > [1] > https://buildd.debian.org/status/fetch.php?pkg=mednafen&arch=m68k&ver=0.9.39.2%2Bdfsg-1&stamp=1482769622
