[PATCH 02/26] OvmfPkg: require GCC48 or later

[Laszlo Ersek <lersek@redhat.com>]

We're about to remove BaseTools support for GCC44..GCC47. Reject those gcc
versions cleanly in "OvmfPkg/build.sh". In "OvmfPkg/README", upgrade any
mentions of the same gcc versions to GCC48.

No GCC44..GCC47 references remain under OvmfPkg after this patch.

Cc: Anthony Perard <anthony.perard@citrix.com>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Jordan Justen <jordan.l.justen@intel.com>
Cc: Julien Grall <julien.grall@linaro.org>
Ref: https://bugzilla.tianocore.org/show_bug.cgi?id=1377
Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
---

Notes:
    I tested that, after this patch, "build.sh" successfully builds OvmfPkg
    with GCC48. I did no runtime tests, nor did I test the rejection path
    with any of gcc-4.4 through gcc-4.7.

 OvmfPkg/README   |  6 +++---
 OvmfPkg/build.sh | 16 ++--------------
 2 files changed, 5 insertions(+), 17 deletions(-)

diff --git a/OvmfPkg/README b/OvmfPkg/README
index 7415419d2dd7..68ce0750af19 100644
--- a/OvmfPkg/README
+++ b/OvmfPkg/README
@@ -115,8 +115,8 @@ $ OvmfPkg/build.sh -a X64 qemu
 And to run a 64-bit UEFI bootable ISO image:
 $ OvmfPkg/build.sh -a X64 qemu -cdrom /path/to/disk-image.iso
 
-To build a 32-bit OVMF without debug messages using GCC 4.5:
-$ OvmfPkg/build.sh -a IA32 -b RELEASE -t GCC45
+To build a 32-bit OVMF without debug messages using GCC 4.8:
+$ OvmfPkg/build.sh -a IA32 -b RELEASE -t GCC48
 
 === SMM support ===
 
@@ -406,7 +406,7 @@ volume image.
 
 If you build with the UNIXGCC toolchain, then debugging will be disabled
 due to larger image sizes being produced by the UNIXGCC toolchain. The
-first choice recommendation is to use GCC44 or newer instead.
+first choice recommendation is to use GCC48 or newer instead.
 
 If you must use UNIXGCC, then you can override the build options for
 particular libraries and modules in the .dsc to re-enable debugging
diff --git a/OvmfPkg/build.sh b/OvmfPkg/build.sh
index 682155202564..6821742e7acd 100755
--- a/OvmfPkg/build.sh
+++ b/OvmfPkg/build.sh
@@ -83,22 +83,10 @@ case `uname` in
   Linux*)
     gcc_version=$(gcc -v 2>&1 | tail -1 | awk '{print $3}')
     case $gcc_version in
-      [1-3].*|4.[0-3].*)
-        echo OvmfPkg requires GCC4.4 or later
+      [1-3].*|4.[0-7].*)
+        echo OvmfPkg requires GCC4.8 or later
         exit 1
         ;;
-      4.4.*)
-        TARGET_TOOLS=GCC44
-        ;;
-      4.5.*)
-        TARGET_TOOLS=GCC45
-        ;;
-      4.6.*)
-        TARGET_TOOLS=GCC46
-        ;;
-      4.7.*)
-        TARGET_TOOLS=GCC47
-        ;;
       4.8.*)
         TARGET_TOOLS=GCC48
         ;;
-- 
2.19.1.3.g30247aa5d201