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Avoid "-Wundef" warnings in C++ mode on the generated code.

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Reported by Heiko Becker <mail@heiko-becker.de> in
<https://lists.gnu.org/archive/html/bug-gperf/2025-04/msg00001.html>
and by Thomas Klausner <wiz@netbsd.org>.

* src/output.cc (Output::output_hash_function): Emit a
'defined __STDC_VERSION__' before the test of __STDC_VERSION__.
* tests/c-parse.exp, tests/charsets.exp, tests/chill.exp,
tests/cplusplus.exp, tests/java.exp, tests/languages.exp,
tests/modula2.exp, tests/objc.exp: Update.
This commit is contained in:
Bruno Haible
2025-04-09 12:29:19 +02:00
parent fe7539a0f9
commit 3bab6ab7bf
10 changed files with 69 additions and 57 deletions
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4
src/output.cc
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@@ -1,5 +1,5 @@
/* Output routines.
Copyright (C) 1989-2024 Free Software Foundation, Inc.
Copyright (C) 1989-2025 Free Software Foundation, Inc.
Written by Douglas C. Schmidt <schmidt@ics.uci.edu>
and Bruno Haible <bruno@clisp.org>.
@@ -953,7 +953,7 @@ Output::output_hash_function () const
/* Pseudo-statement or comment that avoids a compiler warning or
lint warning. */
const char * const fallthrough_marker =
"#if (defined __cplusplus && (__cplusplus >= 201703L || (__cplusplus >= 201103L && defined __clang__ && __clang_major__ + (__clang_minor__ >= 9) > 3))) || (__STDC_VERSION__ >= 202000L && ((defined __GNUC__ && __GNUC__ >= 10) || (defined __clang__ && __clang_major__ >= 9)))\n"
"#if (defined __cplusplus && (__cplusplus >= 201703L || (__cplusplus >= 201103L && defined __clang__ && __clang_major__ + (__clang_minor__ >= 9) > 3))) || (defined __STDC_VERSION__ && __STDC_VERSION__ >= 202000L && ((defined __GNUC__ && __GNUC__ >= 10) || (defined __clang__ && __clang_major__ >= 9)))\n"
" [[fallthrough]];\n"
"#elif (defined __GNUC__ && __GNUC__ >= 7) || (defined __clang__ && __clang_major__ >= 10)\n"
" __attribute__ ((__fallthrough__));\n"