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maketab: support build systems with read-only source. 

If your generated files are considered outputs that live elsewhere, you
need a way to tell maketab where ytab.h actually is.

Specifically, I'm trying to avoid checking in generated files in
Android's AOSP tree's copy of one-true-awk.
This commit is contained in:
Elliott Hughes 2019-01-29 17:20:00 -08:00
parent c3c7c1370e
commit cc165f4be9
2 changed files with 7 additions and 3 deletions
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2
makefile
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@ -67,7 +67,7 @@ y%.c y%.h: awk.h proto.h awkgram.y
ytab.h: ytab.c
proctab.c: maketab
./maketab >proctab.c
./maketab ytab.h >proctab.c
maketab: ytab.h maketab.c
$(CC) $(CFLAGS) maketab.c -o maketab

8
maketab.c
View File

@ -125,8 +125,12 @@ int main(int argc, char *argv[])
for (i = SIZE; --i >= 0; )
names[i] = "";
if ((fp = fopen("ytab.h", "r")) == NULL) {
fprintf(stderr, "maketab can't open ytab.h!\n");
if (argc != 2) {
fprintf(stderr, "usage: maketab YTAB_H\n");
exit(1);
}
if ((fp = fopen(argv[1], "r")) == NULL) {
fprintf(stderr, "maketab can't open %s!\n", argv[1]);
exit(1);
}
printf("static char *printname[%d] = {\n", SIZE);