Defined in 2 files as a macro:

• contrib/diff/src/system.h, line 266 (as a macro)
• gnu/usr.bin/grep/system.h, line 205 (as a macro)

Referenced in 7 files:

• contrib/diff/src/cmp.c, line 198
• contrib/diff/src/diff.c, line 265
• contrib/diff/src/diff3.c, line 230
• contrib/diff/src/sdiff.c, line 455
• contrib/diff/src/system.h, line 265
• gnu/usr.bin/grep/grep.c, line 1363
• gnu/usr.bin/grep/system.h, line 204