[PATCH-for-5.0] roms/edk2-funcs: Force armhf toolchain prefix on Debian

[Philippe Mathieu-Daudé]

The Debian (based) distributions historically provides 2 ARM
toolchains, documented as [1]:

* The ARM EABI (armel) port targets a range of older 32-bit ARM
  devices, particularly those used in NAS hardware and a variety
  of *plug computers.
* The newer ARM hard-float (armhf) port supports newer, more
  powerful 32-bit devices using version 7 of the ARM architecture
  specification.

The EDK2 documentation suggests to use the hard-float toolchain.

Force the armhf cross toolchain prefix on Debian distributions.

[1] https://www.debian.org/ports/arm/#status
[2] 
https://github.com/tianocore/edk2-platforms/blob/master/Readme.md#if-cross-compiling

Signed-off-by: Philippe Mathieu-Daudé <address@hidden>
---
 roms/edk2-funcs.sh | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/roms/edk2-funcs.sh b/roms/edk2-funcs.sh
index 3f4485b201..a546aa1d11 100644
--- a/roms/edk2-funcs.sh
+++ b/roms/edk2-funcs.sh
@@ -112,6 +112,9 @@ qemu_edk2_get_cross_prefix()
      ( [ "$gcc_arch" == i686 ] && [ "$host_arch" == x86_64 ] ); then
     # no cross-compiler needed
     :
+  elif ( [ -e /etc/debian_version ] && [ "$gcc_arch" == arm ] ); then
+    # force hard-float cross-compiler on Debian
+    printf 'arm-linux-gnueabihf-'
   else
     printf '%s-linux-gnu-\n' "$gcc_arch"
   fi
-- 
2.21.0