Bug 1802228 - Select a host linker in the same manner we do for the target linker. r=firefox-build-system-reviewers,ahochheiden

Differential Revision: https://phabricator.services.mozilla.com/D162912

build/moz.configure/toolchain.configure

@@ -1545,7 +1545,10 @@ def enable_linker(linker):
     return linker
 
 
-@depends(
+@template
+def select_linker_tmpl(host_or_target):
+    if host_or_target is target:
+        deps = depends(
             "--enable-linker",
             c_compiler,
             developer_options,
@@ -1553,7 +1556,19 @@ def enable_linker(linker):
             target,
             when=is_linker_option_enabled,
         )
-@checking("for linker", lambda x: x.KIND)
+        host_or_target_str = "target"
+    else:
+        deps = depends(
+            dependable(None),
+            host_c_compiler,
+            developer_options,
+            dependable(None),
+            host,
+        )
+        host_or_target_str = "host"
+
+    @deps
+    @checking(f"for {host_or_target_str} linker", lambda x: x.KIND)
     @imports("os")
     @imports("shutil")
     def select_linker(linker, c_compiler, developer_options, toolchain_flags, target):
@@ -1673,11 +1688,17 @@ def select_linker(linker, c_compiler, developer_options, toolchain_flags, target
 
         return result
 
+    return select_linker
 
+
+select_linker = select_linker_tmpl(target)
 set_config("LINKER_KIND", select_linker.KIND)
 
 
-@depends_if(
+@template
+def linker_ldflags_tmpl(host_or_target):
+    if host_or_target is target:
+        deps = depends_if(
             select_linker,
             target,
             target_sysroot,
@@ -1686,6 +1707,18 @@ set_config("LINKER_KIND", select_linker.KIND)
             c_compiler,
             developer_options,
         )
+    else:
+        deps = depends_if(
+            select_linker_tmpl(host),
+            host,
+            host_sysroot,
+            host_multiarch_dir,
+            dependable(None),
+            host_c_compiler,
+            developer_options,
+        )
+
+    @deps
     @imports("os")
     def linker_ldflags(
         linker,
@@ -1708,7 +1741,11 @@ def linker_ldflags(
                     # GCC also needs -L.
                     if c_compiler.type == "gcc":
                         flags.append("-L%s" % multiarch_lib_dir)
-        if c_compiler.type == "gcc" and sysroot.bootstrapped and sysroot.stdcxx_version:
+            if (
+                c_compiler.type == "gcc"
+                and sysroot.bootstrapped
+                and sysroot.stdcxx_version
+            ):
                 flags.append(
                     "-L{}/usr/lib/gcc/{}/{}".format(
                         sysroot.path, multiarch_dir, sysroot.stdcxx_version
@@ -1728,9 +1765,14 @@ def linker_ldflags(
             flags.append("-Wl,-O0")
         return flags
 
+    return linker_ldflags
 
+
+linker_ldflags = linker_ldflags_tmpl(target)
 add_old_configure_assignment("LINKER_LDFLAGS", linker_ldflags)
 
+add_old_configure_assignment("HOST_LINKER_LDFLAGS", linker_ldflags_tmpl(host))
+
 
 # There's a wrinkle with MinGW: linker configuration is not enabled, so
 # `select_linker` is never invoked.  Hard-code around it.

js/src/old-configure.in

@@ -58,6 +58,7 @@ USE_PTHREADS=
 _PTHREAD_LDFLAGS=""
 
 LDFLAGS="$LDFLAGS $LINKER_LDFLAGS"
+HOST_LDFLAGS="$HOST_LDFLAGS $HOST_LINKER_LDFLAGS"
 
 if test -z "$JS_STANDALONE"; then
   autoconfmk=autoconf-js.mk

old-configure.in

@@ -58,6 +58,7 @@ MOZ_USE_PTHREADS=
 _PTHREAD_LDFLAGS=""
 
 LDFLAGS="$LDFLAGS $LINKER_LDFLAGS"
+HOST_LDFLAGS="$HOST_LDFLAGS $HOST_LINKER_LDFLAGS"
 
 if test "$COMPILE_ENVIRONMENT"; then
     MOZ_ANDROID_NDK