llvm7: patch llvm-config to emit correct cflags

See https://bugzilla.redhat.com/show_bug.cgi?id=1672012.

[ci skip]

srcpkgs/llvm7/files/patches/llvm/llvm-003-llvm-config-cflags.patch

@@ -0,0 +1,88 @@
+From dda331284db4cb6a43481aa7735dee26e504ff36 Mon Sep 17 00:00:00 2001
+From: Tom Stellard <tstellar@redhat.com>
+Date: Thu, 13 Dec 2018 18:21:23 +0000
+Subject: [PATCH] Don't add unnecessary compiler flags to llvm-config output
+
+Summary:
+llvm-config --cxxflags --cflags, should only output the minimal flags
+required to link against the llvm libraries.  They currently contain
+all flags used to compile llvm including flags like -g, -pedantic,
+-Wall, etc, which users may not always want.
+
+This changes the llvm-config output to only include flags that have been
+explictly added to the COMPILE_FLAGS property of the llvm-config target
+by the llvm build system.
+
+llvm.org/PR8220
+
+Output from llvm-config when running cmake with:
+cmake -G Ninja .. -DCMAKE_CXX_FLAGS=-funroll-loops
+
+Before:
+
+--cppflags: -I$HEADERS_DIR/llvm/include -I$HEADERS_DIR/llvm/build/include
+            -D_GNU_SOURCE -D_DEBUG -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
+--cflags:   -I$HEADERS_DIR/llvm/include -I$HEADERS_DIR/llvm/build/include
+            -fPIC -Werror=date-time -Wall -Wextra -Wno-unused-parameter -Wwrite-strings \
+            -Wno-missing-field-initializers -pedantic -Wno-long-long -Wimplicit-fallthrough \
+            -Wno-comment -fdiagnostics-color -g -D_GNU_SOURCE -D_DEBUG -D__STDC_CONSTANT_MACROS \
+            -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
+--cxxflags: -I$HEADERS_DIR/llvm/include -I$HEADERS_DIR/llvm/build/include\
+            -funroll-loops -fPIC -fvisibility-inlines-hidden -Werror=date-time -std=c++11 -Wall \
+            -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wno-missing-field-initializers \
+            -pedantic -Wno-long-long -Wimplicit-fallthrough -Wno-maybe-uninitialized \
+            -Wno-class-memaccess -Wno-noexcept-type -Wdelete-non-virtual-dtor -Wno-comment \
+            -fdiagnostics-color -g  -fno-exceptions -fno-rtti -D_GNU_SOURCE -D_DEBUG \
+            -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS"
+
+After:
+
+--cppflags: -I$HEADERS_DIR/llvm/include -I$HEADERS_DIR/llvm/build/include \
+            -D_GNU_SOURCE -D_DEBUG -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
+--cflags:   -I$HEADERS_DIR/llvm/include -I$HEADERS_DIR/llvm/build/include \
+            -D_GNU_SOURCE -D_DEBUG -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
+--cxxflags: -I$HEADERS_DIR/llvm/include -I$HEADERS_DIR/llvm/build/include \
+             -std=c++11   -fno-exceptions -fno-rtti \
+             -D_GNU_SOURCE -D_DEBUG -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS
+
+Reviewers: sylvestre.ledru, infinity0, mgorny
+
+Reviewed By: sylvestre.ledru, mgorny
+
+Subscribers: mgorny, dmgreen, llvm-commits
+
+Differential Revision: https://reviews.llvm.org/D55391
+
+llvm-svn: 349068
+---
+ llvm/tools/llvm-config/CMakeLists.txt | 14 +++++++++++---
+ 1 file changed, 11 insertions(+), 3 deletions(-)
+
+diff --git a/tools/llvm-config/CMakeLists.txt b/tools/llvm-config/CMakeLists.txt
+index a0bd36c3731..a7db17386fb 100644
+--- a/tools/llvm-config/CMakeLists.txt
++++ b/tools/llvm-config/CMakeLists.txt
+@@ -29,12 +29,20 @@ string(REPLACE ";" " " SYSTEM_LIBS "${SYSTEM_LIBS}")
+ # Fetch target specific compile options, e.g. RTTI option
+ get_property(COMPILE_FLAGS TARGET llvm-config PROPERTY COMPILE_FLAGS)
+ 
++# The language standard potentially affects the ABI/API of LLVM, so we want
++# to make sure it is reported by llvm-config.
++# NOTE: We don't want to start extracting any random C/CXX flags that the
++# user may add that could affect the ABI.  We only want to extract flags
++# that have been added by the LLVM build system.
++string(REGEX MATCH "-std=[^ ]\+" LLVM_CXX_STD_FLAG ${CMAKE_CXX_FLAGS})
++string(REGEX MATCH "-std=[^ ]\+" LLVM_C_STD_FLAG ${CMAKE_C_FLAGS})
++
+ # Use configure_file to create BuildVariables.inc.
+ set(LLVM_SRC_ROOT ${LLVM_MAIN_SRC_DIR})
+ set(LLVM_OBJ_ROOT ${LLVM_BINARY_DIR})
+-set(LLVM_CPPFLAGS "${CMAKE_CPP_FLAGS} ${CMAKE_CPP_FLAGS_${uppercase_CMAKE_BUILD_TYPE}} ${LLVM_DEFINITIONS}")
+-set(LLVM_CFLAGS "${CMAKE_C_FLAGS} ${CMAKE_C_FLAGS_${uppercase_CMAKE_BUILD_TYPE}} ${LLVM_DEFINITIONS}")
+-set(LLVM_CXXFLAGS "${CMAKE_CXX_FLAGS} ${CMAKE_CXX_FLAGS_${uppercase_CMAKE_BUILD_TYPE}} ${COMPILE_FLAGS} ${LLVM_DEFINITIONS}")
++set(LLVM_CPPFLAGS "${LLVM_DEFINITIONS}")
++set(LLVM_CFLAGS "${LLVM_C_STD_FLAG} ${LLVM_DEFINITIONS}")
++set(LLVM_CXXFLAGS "${LLVM_CXX_STD_FLAG} ${COMPILE_FLAGS} ${LLVM_DEFINITIONS}")
+ set(LLVM_BUILD_SYSTEM cmake)
+ set(LLVM_HAS_RTTI ${LLVM_CONFIG_HAS_RTTI})
+ set(LLVM_DYLIB_VERSION "${LLVM_VERSION_MAJOR}${LLVM_VERSION_SUFFIX}")

srcpkgs/llvm7/template

@@ -1,7 +1,7 @@
 # Template file for 'llvm7'
 pkgname=llvm7
 version=7.0.1
-revision=4
+revision=5
 wrksrc="llvm-${version}.src"
 build_style=cmake
 configure_args="