From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Peter Jones <pjones@redhat.com>
Date: Tue, 26 Jun 2018 17:16:06 -0400
Subject: [PATCH] Make it so we can tell configure which cflags utils are built
 with

This lets us have kernel.img be built with TARGET_CFLAGS but grub-mkimage and
friends built with HOST_CFLAGS.  That in turn lets us build with an ARM compiler
that only has hard-float ABI versions of crt*.o and libgcc*, but still use soft
float for grub.efi.

Signed-off-by: Peter Jones <pjones@redhat.com>
---
 configure.ac         | 49 ++++++++++++++++++++++++++++++++++++++++++++++++-
 conf/Makefile.common | 23 ++++++++++++-----------
 gentpl.py            |  8 ++++----
 3 files changed, 64 insertions(+), 16 deletions(-)

diff --git a/configure.ac b/configure.ac
index 9ab683fef..819212095 100644
--- a/configure.ac
+++ b/configure.ac
@@ -850,11 +850,23 @@ if ( test "x$target_cpu" = xi386 || test "x$target_cpu" = xx86_64 ) && test "x$p
   TARGET_CFLAGS="$TARGET_CFLAGS -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow"
 fi
 
+# Should grub utils get the host CFLAGS, or the target CFLAGS?
+AC_ARG_WITH([utils],
+            AS_HELP_STRING([--with-utils=host|target|build],
+                           [choose which flags to build utilities with. (default=target)]),
+	    [have_with_utils=y],
+	    [have_with_utils=n])
+if test x"$have_with_utils" = xy ; then
+  with_utils="$withval"
+else
+  with_utils=target
+fi
+
 # GRUB doesn't use float or doubles at all. Yet some toolchains may decide
 # that floats are a good fit to run instead of what's written in the code.
 # Given that floating point unit is disabled (if present to begin with)
 # when GRUB is running which may result in various hard crashes.
-if test x"$platform" != xemu ; then
+if test x"$platform" != xemu -a x"$with_utils" == xtarget ; then
   AC_CACHE_CHECK([for options to get soft-float], grub_cv_target_cc_soft_float, [
     grub_cv_target_cc_soft_float=no
     if test "x$target_cpu" = xarm64; then
@@ -1939,6 +1951,41 @@ HOST_CPPFLAGS="$HOST_CPPFLAGS -I\$(top_builddir)/include"
 TARGET_CPPFLAGS="$TARGET_CPPFLAGS -I\$(top_srcdir)/include"
 TARGET_CPPFLAGS="$TARGET_CPPFLAGS -I\$(top_builddir)/include"
 
+case "$with_utils" in
+  host)
+    UTILS_CFLAGS=$HOST_CFLAGS
+    UTILS_CPPFLAGS=$HOST_CPPFLAGS
+    UTILS_CCASFLAGS=$HOST_CCASFLAGS
+    UTILS_LDFLAGS=$HOST_LDFLAGS
+    ;;
+  target)
+    UTILS_CFLAGS=$TARGET_CFLAGS
+    UTILS_CPPFLAGS=$TARGET_CPPFLAGS
+    UTILS_CCASFLAGS=$TARGET_CCASFLAGS
+    UTILS_LDFLAGS=$TARGET_LDFLAGS
+    ;;
+  build)
+    UTILS_CFLAGS=$BUILD_CFLAGS
+    UTILS_CPPFLAGS=$BUILD_CPPFLAGS
+    UTILS_CCASFLAGS=$BUILD_CCASFLAGS
+    UTILS_LDFLAGS=$BUILD_LDFLAGS
+    ;;
+  *)
+    AC_MSG_ERROR([--with-utils must be either host, target, or build])
+    ;;
+esac
+AC_MSG_NOTICE([Using $with_utils flags for utilities.])
+
+unset CFLAGS
+unset CPPFLAGS
+unset CCASFLAGS
+unset LDFLAGS
+
+AC_SUBST(UTILS_CFLAGS)
+AC_SUBST(UTILS_CPPFLAGS)
+AC_SUBST(UTILS_CCASFLAGS)
+AC_SUBST(UTILS_LDFLAGS)
+
 GRUB_TARGET_CPU="${target_cpu}"
 GRUB_PLATFORM="${platform}"
 
diff --git a/conf/Makefile.common b/conf/Makefile.common
index 1ecb921db..b93879804 100644
--- a/conf/Makefile.common
+++ b/conf/Makefile.common
@@ -40,24 +40,25 @@ CPPFLAGS_KERNEL = $(CPPFLAGS_CPU) $(CPPFLAGS_PLATFORM) -DGRUB_KERNEL=1
 CCASFLAGS_KERNEL = $(CCASFLAGS_CPU) $(CCASFLAGS_PLATFORM)
 STRIPFLAGS_KERNEL = -R .eh_frame -R .rel.dyn -R .reginfo -R .note -R .comment -R .drectve -R .note.gnu.gold-version -R .MIPS.abiflags -R .ARM.exidx -R .note.gnu.property -R .gnu.build.attributes
 
-CFLAGS_MODULE = $(CFLAGS_PLATFORM) -ffreestanding
-LDFLAGS_MODULE = $(LDFLAGS_PLATFORM) -nostdlib $(TARGET_LDFLAGS_OLDMAGIC) -Wl,-r,-d
-CPPFLAGS_MODULE = $(CPPFLAGS_CPU) $(CPPFLAGS_PLATFORM)
-CCASFLAGS_MODULE = $(CCASFLAGS_CPU) $(CCASFLAGS_PLATFORM)
+CFLAGS_MODULE = $(TARGET_CFLAGS) $(CFLAGS_PLATFORM) -ffreestanding
+LDFLAGS_MODULE = $(TARGET_LDFLAGS) $(LDFLAGS_PLATFORM) -nostdlib $(TARGET_LDFLAGS_OLDMAGIC) -Wl,-r,-d
+CPPFLAGS_MODULE = $(TARGET_CPPFLAGS) $(CPPFLAGS_DEFAULT) $(CPPFLAGS_CPU) $(CPPFLAGS_PLATFORM)
+CCASFLAGS_MODULE = $(TARGET_CCASFLAGS) $(CCASFLAGS_DEFAULT) $(CCASFLAGS_CPU) $(CCASFLAGS_PLATFORM)
 
 CFLAGS_IMAGE = $(CFLAGS_PLATFORM) -fno-builtin
 LDFLAGS_IMAGE = $(LDFLAGS_PLATFORM) -nostdlib $(TARGET_LDFLAGS_OLDMAGIC) -Wl,-S
 CPPFLAGS_IMAGE = $(CPPFLAGS_CPU) $(CPPFLAGS_PLATFORM)
 CCASFLAGS_IMAGE = $(CCASFLAGS_CPU) $(CCASFLAGS_PLATFORM)
 
-CFLAGS_PROGRAM =
-LDFLAGS_PROGRAM =
-CPPFLAGS_PROGRAM =
-CCASFLAGS_PROGRAM =
+CFLAGS_PROGRAM = $(UTILS_CFLAGS)
+LDFLAGS_PROGRAM = $(UTILS_LDFLAGS)
+CPPFLAGS_PROGRAM = $(UTILS_CPPFLAGS)
+CCASFLAGS_PROGRAM = $(UTILS_CCASFLAGS)
 
-CFLAGS_LIBRARY =
-CPPFLAGS_LIBRARY =
-CCASFLAGS_LIBRARY =
+CFLAGS_LIBRARY = $(UTILS_CFLAGS)
+LDFLAGS_LIBRARY = $(UTILS_LDFLAGS)
+CPPFLAGS_LIBRARY = $(UTILS_CPPFLAGS)
+CCASFLAGS_LIBRARY = $(UTILS_CCASFLAGS)
 
 # Other variables
 
diff --git a/gentpl.py b/gentpl.py
index 6409736e8..1e4635f44 100644
--- a/gentpl.py
+++ b/gentpl.py
@@ -694,10 +694,10 @@ def module(defn, platform):
     var_set(cname(defn) + "_SOURCES", platform_sources(defn, platform) + " ## platform sources")
     var_set("nodist_" + cname(defn) + "_SOURCES", platform_nodist_sources(defn, platform) + " ## platform nodist sources")
     var_set(cname(defn) + "_LDADD", platform_ldadd(defn, platform))
-    var_set(cname(defn) + "_CFLAGS", "$(AM_CFLAGS) $(CFLAGS_MODULE) " + platform_cflags(defn, platform))
-    var_set(cname(defn) + "_LDFLAGS", "$(AM_LDFLAGS) $(LDFLAGS_MODULE) " + platform_ldflags(defn, platform))
-    var_set(cname(defn) + "_CPPFLAGS", "$(AM_CPPFLAGS) $(CPPFLAGS_MODULE) " + platform_cppflags(defn, platform))
-    var_set(cname(defn) + "_CCASFLAGS", "$(AM_CCASFLAGS) $(CCASFLAGS_MODULE) " + platform_ccasflags(defn, platform))
+    var_set(cname(defn) + "_CFLAGS", "$(CFLAGS_MODULE) " + platform_cflags(defn, platform))
+    var_set(cname(defn) + "_LDFLAGS", "$(LDFLAGS_MODULE) " + platform_ldflags(defn, platform))
+    var_set(cname(defn) + "_CPPFLAGS", "$(CPPFLAGS_MODULE) " + platform_cppflags(defn, platform))
+    var_set(cname(defn) + "_CCASFLAGS", "$(CCASFLAGS_MODULE) " + platform_ccasflags(defn, platform))
     var_set(cname(defn) + "_DEPENDENCIES", "$(TARGET_OBJ2ELF) " + platform_dependencies(defn, platform))
 
     gvar_add("dist_noinst_DATA", extra_dist(defn))