[PATCH 2/2] testsuite: stdlib/isomac.c: fix REQUIREMENTS

[наб <nabijaczleweli@nabijaczleweli.xyz>]

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All of the mentioned variables are gone. gcc is just the default and
argv[1] can be used instead. /usr/include isn't hard-coded and you can
pass argv[2] with -I... to adjust.

Signed-off-by: Ahelenia Ziemiańska <nabijaczleweli@nabijaczleweli.xyz>
---
Please keep me in CC, as I'm not subscribed.

 stdlib/isomac.c | 11 ++++-------
 1 file changed, 4 insertions(+), 7 deletions(-)

diff --git a/stdlib/isomac.c b/stdlib/isomac.c
index 3a6009d988..a371bb2593 100644
--- a/stdlib/isomac.c
+++ b/stdlib/isomac.c
@@ -45,14 +45,11 @@
    compiler compiles some other language than Standard C.
 
    REQUIREMENTS:
-     This program calls gcc to get the list of defined macros. If you
+     This program calls ${1-gcc} to get the list of defined macros. If you
      don't have gcc you're probably out of luck unless your compiler or
-     preprocessor has something similar to gcc's -dM option. Tune
-     PRINT_MACROS in this case. This program assumes headers are found
-     under /usr/include and that there is a writable /tmp directory.
-     Tune SYSTEM_INCLUDE if your system differs.
-     #define BROKEN_SYSTEM if system(NULL) bombs -- one more violation
-     of ISO C, by the way.
+     preprocessor has something similar to gcc's -dM option. This program
+     assumes headers are found in the default search path (pass -I... in
+     $2 if this is not the case) and that there is a writable /tmp directory.
 
    OUTPUT:
      Each header file name is printed, followed by illegal macro names
-- 
2.30.2

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