From a2a2cfae8a36a040b25ec3d5af941b2eccf76da8 Mon Sep 17 00:00:00 2001
From: "H.J. Lu" <hjl.tools@gmail.com>
Date: Mon, 13 Apr 2026 08:23:05 +0800
Subject: [PATCH 1/2] Check if linker supports -z separate-code

Set have-separate-code to yes if linker supports -z separate-code.

Signed-off-by: H.J. Lu <hjl.tools@gmail.com>
---
 configure    | 35 +++++++++++++++++++++++++++++++++++
 configure.ac |  6 ++++++
 2 files changed, 41 insertions(+)

diff --git a/configure b/configure
index c84d283bd5..2c1a66f6c5 100755
--- a/configure
+++ b/configure
@@ -7350,6 +7350,41 @@ printf "%s\n" "$libc_linker_feature" >&6; }
 config_vars="$config_vars
 have-no-dynamic-linker = $libc_cv_no_dynamic_linker"
 
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for linker that supports -z separate-code" >&5
+printf %s "checking for linker that supports -z separate-code... " >&6; }
+libc_linker_feature=no
+cat > conftest.c <<EOF
+int _start (void) { return 42; }
+EOF
+if { ac_try='${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS $no_ssp
+		  -Wl,-z,separate-code -nostdlib -nostartfiles
+		  -fPIC -shared -o conftest.so conftest.c
+		  1>&5'
+  { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
+  (eval $ac_try) 2>&5
+  ac_status=$?
+  printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; }; }
+then
+  if ${CC-cc} $CFLAGS $CPPFLAGS $LDFLAGS $no_ssp -Wl,-z,separate-code -nostdlib \
+      -nostartfiles -fPIC -shared -o conftest.so conftest.c 2>&1 \
+      | grep "warning: -z separate-code ignored" > /dev/null 2>&1; then
+    true
+  else
+    libc_linker_feature=yes
+  fi
+fi
+rm -f conftest*
+if test $libc_linker_feature = yes; then
+  libc_cv_separate_code=yes
+else
+  libc_cv_separate_code=no
+fi
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $libc_linker_feature" >&5
+printf "%s\n" "$libc_linker_feature" >&6; }
+config_vars="$config_vars
+have-separate-code = $libc_cv_separate_code"
+
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for -static-pie" >&5
 printf %s "checking for -static-pie... " >&6; }
diff --git a/configure.ac b/configure.ac
index 280ec8e5b3..71b13ad104 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1356,6 +1356,12 @@ LIBC_LINKER_FEATURE([--no-dynamic-linker],
 		    [libc_cv_no_dynamic_linker=no])
 LIBC_CONFIG_VAR([have-no-dynamic-linker], [$libc_cv_no_dynamic_linker])
 
+LIBC_LINKER_FEATURE([-z separate-code],
+		    [-Wl,-z,separate-code],
+		    [libc_cv_separate_code=yes],
+		    [libc_cv_separate_code=no])
+LIBC_CONFIG_VAR([have-separate-code], [$libc_cv_separate_code])
+
 LIBC_TRY_CC_AND_TEST_CC_OPTION(for -static-pie, [-static-pie],
   libc_cv_static_pie,
   [libc_cv_static_pie=yes], [libc_cv_static_pie=no],
-- 
2.53.0