academic/ITK: Support for Slackware current.

academic/ITK/ITK.SlackBuild

@@ -76,6 +76,9 @@ sed -i "s/lib\b/lib${LIBDIRSUFFIX}/" CMakeLists.txt
 sed -i "s|/opj_config.h|& \$\{CMAKE_CURRENT_BINARY_DIR\}/openjpeg_mangle.h|" \
     Modules/ThirdParty/GDCM/src/gdcm/Utilities/gdcmopenjpeg/src/lib/openjp2/CMakeLists.txt
 
+# allow compilation under GCC 8
+patch -p1 Modules/ThirdParty/VNL/src/vxl/vcl/vcl_compiler.h < $CWD/gcc8.patch
+
 mkdir -p build
 cd build
   cmake \

academic/ITK/gcc8.patch

@@ -0,0 +1,34 @@
+From 2662860491ff44a16e01581a6b3727d53997fee8 Mon Sep 17 00:00:00 2001
+From: Pablo Hernandez-Cerdan <pablo.hernandez.cerdan@outlook.com>
+Date: Tue, 15 May 2018 16:17:01 -0400
+Subject: [PATCH] COMP: Add gcc8 support to vcl_compiler.
+
+It just adds a if/else branch to the existing logic.
+
+Triggered here: https://discourse.itk.org/t/building-and-compiling-with-gcc-8-1/934/4
+---
+ vcl/vcl_compiler.h | 11 +++++++++++
+ 1 file changed, 11 insertions(+)
+
+diff --git a/vcl/vcl_compiler.h b/vcl/vcl_compiler.h
+index 6a3f2e2152..5ca624603d 100644
+--- a/vcl/vcl_compiler.h
++++ b/vcl/vcl_compiler.h
+@@ -86,6 +86,17 @@
+ #  else
+ #   define VCL_GCC_70
+ #  endif
++# elif (__GNUC__==8)
++#  define VCL_GCC_8
++#  if (__GNUC_MINOR__ > 2 )
++#   define VCL_GCC_83
++#  elif (__GNUC_MINOR__ > 1 )
++#   define VCL_GCC_82
++#  elif (__GNUC_MINOR__ > 0 )
++#   define VCL_GCC_81
++#  else
++#   define VCL_GCC_80
++#  endif
+ # else
+ #  error "Dunno about this gcc"
+ # endif