From 7f463b00715461c597130a6b4084a015597b8e3a Mon Sep 17 00:00:00 2001
From: Herman Semenoff <GermanAizek@yandex.ru>
Date: Sat, 2 May 2026 11:21:15 +0300
Subject: [PATCH] htop: fix building htop for TCC compiler

My experiments on 2 CPUs Xeon E5-2699v3 (72 threads):
I am surprised by the compilation speed on TCC, as well as the resource consumption on monitoring
- TCC 3s compilation
- Clang 12s compilation
- GCC 15s compialtion

Wiki: https://en.wikipedia.org/wiki/Tiny_C_Compiler
Official site: https://bellard.org/tcc/
---
 configure.ac | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/configure.ac b/configure.ac
index 768cd4748..04ff1dad1 100644
--- a/configure.ac
+++ b/configure.ac
@@ -349,10 +349,10 @@ AC_LINK_IFELSE(
 )
 
 AC_MSG_CHECKING(for __builtin_ctz)
-AC_COMPILE_IFELSE(
+AC_LINK_IFELSE(
    [AC_LANG_PROGRAM(
       [],
-      [[__builtin_ctz(1); /* Supported in GCC 3.4 or later */]]
+      [[volatile int test_ctz = __builtin_ctz(1); (void)test_ctz; /* Supported in GCC 3.4 or later */]]
    )],
    AC_DEFINE([HAVE_BUILTIN_CTZ], 1, [Define to 1 if the compiler supports '__builtin_ctz' function.])
    AC_MSG_RESULT(yes),