From 19f1a11e7ea2a5082bae9d9a079338c5658ba954 Mon Sep 17 00:00:00 2001
From: "H.J. Lu" <hjl.tools@gmail.com>
Date: Fri, 4 Aug 2017 12:17:15 -0700
Subject: Check linker support for INSERT in linker script

Since gold doesn't support INSERT in linker script:

https://sourceware.org/bugzilla/show_bug.cgi?id=21676

tst-split-dynreloc fails to link with gold.  Check if linker supports
INSERT in linker script before using it.

	* config.make.in (have-insert): New.
	* configure.ac (libc_cv_insert): New.  Set to yes if linker
	supports INSERT in linker script.
	(AC_SUBST(libc_cv_insert): New.
	* configure: Regenerated.
	* sysdeps/x86_64/Makefile (tests): Add tst-split-dynreloc only
	if $(have-insert) == yes.
---
 configure.ac | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

(limited to 'configure.ac')

diff --git a/configure.ac b/configure.ac
index 77456aa8d9..2c6308883c 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1298,6 +1298,27 @@ EOF
 	       ])
 AC_SUBST(libc_cv_protected_data)
 
+AC_CACHE_CHECK(linker support for INSERT in linker script,
+	       libc_cv_insert,
+	       [cat > conftest.c <<EOF
+		const int __attribute__ ((section(".bar"))) bar = 0x12345678;
+		int test (void) { return bar; }
+EOF
+		cat > conftest.t <<EOF
+		SECTIONS
+		{
+		  .bar : { *(.bar) }
+		}
+		INSERT AFTER .rela.dyn;
+EOF
+		libc_cv_insert=no
+		if AC_TRY_COMMAND([${CC-cc} -nostdlib -nostartfiles $no_ssp -fPIC -shared conftest.c -Wl,-T,conftest.t -o conftest.so]); then
+		  libc_cv_insert=yes
+		fi
+		rm -f conftest.*
+	       ])
+AC_SUBST(libc_cv_insert)
+
 AC_CACHE_CHECK(for broken __attribute__((alias())),
 	       libc_cv_broken_alias_attribute,
 	       [cat > conftest.c <<EOF
-- 
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