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 9ab683fefac..819212095ff 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 1ecb921db65..b93879804c0 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 6409736e81c..1e4635f4426 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))