From 43ddbe073025fe2ff454dabb84674ccdbd013487 Mon Sep 17 00:00:00 2001
From: Alfred Wingate <parona@protonmail.com>
Date: Wed, 29 Jan 2025 09:32:49 +0200
Subject: [PATCH] Declare HAVE_ERROR_H only if error symbol is available
Musl doesn't provide error.h. But there exists a standalone implementation
that installs /usr/include/error.h but requires explicit linkage. This
leads linkage errors later on due to the assumption that error
symbols are provided by the libc.
Bug: https://bugs.gentoo.org/948878
Signed-off-by: Alfred Wingate <parona@protonmail.com>
---
configure.ac | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/configure.ac b/configure.ac
index 1da2a12c..7a2f2540 100644
--- a/configure.ac
+++ b/configure.ac
@@ -477,7 +477,7 @@ AC_CHECK_FUNCS([process_vm_readv mremap])
AS_IF([test "x$ac_cv_func_mremap" = "xno"],
[AC_MSG_WARN([elf_update needs mremap to support ELF_C_RDWR_MMAP])])
-AC_CHECK_HEADERS([error.h])
+AC_CHECK_HEADER([error.h], [AC_CHECK_FUNC([error], AC_DEFINE([HAVE_ERROR_H], [1], [Define if error.h is usable]))])
AC_CHECK_HEADERS([err.h])
dnl for debuginfod concurrency heuristics
--
2.48.1