From abf64f809ff96895c42254af4489b2f5eb95e4c6 Mon Sep 17 00:00:00 2001
From: Thomas White <taw@physics.org>
Date: Tue, 6 Feb 2024 11:56:49 +0100
Subject: Sort-of-workaround for argp '--help' crash on MacOS

Indexamajig --help causes a segfault on MacOS due to a bug in
argp-standalone.  That package is unlikely to be updated any time soon.
Eventually, Homebrew might switch to one of the non-crashy forks, but
probably not soon.  We aren't the only ones affected - see
https://www.openwall.com/lists/musl/2021/02/10/1

This commit adds a warning message to state that we already know about
it, and it's not "our" fault.  It also removes the corresponding test,
since we know it fails.
---
 src/indexamajig.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

(limited to 'src/indexamajig.c')

diff --git a/src/indexamajig.c b/src/indexamajig.c
index ce8b2cbf..aa0db210 100644
--- a/src/indexamajig.c
+++ b/src/indexamajig.c
@@ -1183,6 +1183,20 @@ int main(int argc, char *argv[])
 		{0}
 	};
 
+	#if defined(__APPLE__)
+	int q;
+	for ( q=0; q<argc; q++ ) {
+		if ( strcmp(argv[q], "--help") == 0 ) {
+			fprintf(stderr, "\n"
+			        "WARNING: 'indexamajig --help' crashes on some Mac OS versions.\n"
+			        "This is a known problem, and is due to a bug in external library "
+			        "code.\n\n");
+			fflush(stderr);
+			break;
+		}
+	}
+	#endif
+
 	static struct argp argp = { options, parse_arg, NULL, doc,
 	                            argp_children, NULL, NULL };
 	if ( argp_parse(&argp, argc, argv, 0, NULL, &args) ) return 1;
-- 
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