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--- a/src/files.c
+++ b/src/files.c
@@ -560,9 +560,9 @@ pkgdatadir (void)
char const *
m4path (void)
{
- char const *m4 = getenv ("M4");
+ char const *m4 = getenv ("STAGING_DIR_HOST");
if (m4)
- return m4;
+ return strcat(getenv ("STAGING_DIR_HOST"), "/bin/m4");
/* We don't use relocate2() to store the temporary buffer and re-use
it, because m4path() is only called once. */
--- a/src/getargs.c
+++ b/src/getargs.c
@@ -373,11 +373,13 @@ usage (int status)
A --long option is required.
Otherwise, add exceptions to ../build-aux/cross-options.pl. */
- printf (_("Usage: %s [OPTION]... FILE\n"), program_name);
+ printf (_("Usage: STAGING_DIR_HOST=... %s [OPTION]... FILE\n"), program_name);
fputs (_("\
Generate a deterministic LR or generalized LR (GLR) parser employing\n\
LALR(1), IELR(1), or canonical LR(1) parser tables.\n\
\n\
+Environment Variable STAGING_DIR_HOST controls path to m4\n\
+\n\
"), stdout);
fputs (_("\
@@ -450,6 +452,11 @@ Output Files:\n\
-M, --file-prefix-map=OLD=NEW replace prefix OLD with NEW when writing file paths\n\
in output files\n\
"), stdout);
+
+ fputs (_("\
+Environment Variables:\n\
+ STAGING_DIR_HOST Path to m4 is [STAGING_DIR_HOST]/bin/m4\n\
+"), stdout);
putc ('\n', stdout);
argmatch_report_usage (stdout);
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