From 8530ea4eafd68d8629da1b5fbaf2ccf4c9ed9e76 Mon Sep 17 00:00:00 2001
From: Philippe PITTOLI <p.pittoli@unistra.fr>
Date: Fri, 18 Oct 2019 03:25:53 +0200
Subject: [PATCH] clang recipe modifications and new scripts

---
 clang/clang           | 52 +++++++++++++++++++++++++++++++++++++++++++
 clang/labs.h          |  7 ++++++
 clang/recipe.spec     | 28 ++++++++++++++++++++---
 clang/wrapper-clang++ |  8 +++++++
 clang/x86_64.cfg      |  4 ++++
 5 files changed, 96 insertions(+), 3 deletions(-)
 create mode 100755 clang/clang
 create mode 100644 clang/labs.h
 create mode 100644 clang/wrapper-clang++
 create mode 100644 clang/x86_64.cfg

diff --git a/clang/clang b/clang/clang
new file mode 100755
index 0000000..0bd85b8
--- /dev/null
+++ b/clang/clang
@@ -0,0 +1,52 @@
+#!/bin/sh
+
+requires_linking="true"
+is_cpp=false
+
+if [ "$(basename $0)" = "clang++" ]; then
+	is_cpp=true
+fi
+
+for i; do
+	case "$i" in
+		-c)
+			requires_linking="false"
+		;;
+		-std=*)
+			std="$(printf "%s" "$i" | sed 's:-std=::')"
+
+			if echo "$std" | grep -E -q '(c\+\+|gnu\+\+)'; then
+				is_cpp=true
+			else
+				is_cpp=false
+			fi
+		;;
+	esac
+done
+
+cpp_flags=
+if $is_cpp; then
+	cpp_flags="
+		-cxx-isystem /usr/weirdos/lib/c++/v1
+	"
+fi
+
+linker_flags=
+if $requires_linking; then
+	linker_flags="
+		-L /usr/weirdos/lib
+		-L /usr/weirdos/lib/gcc/x86_64-weird-linux-musl/9.1.0/
+		-B /usr/weirdos/lib/gcc/x86_64-weird-linux-musl/9.1.0/
+		-Wl,--dynamic-linker /lib/ld-musl-x86_64.so.1
+	"
+
+	if $is_cpp; then
+		cpp_flags="$cpp_flags -lc++ -lc++abi"
+	fi
+fi
+
+clang-8 \
+	-isystem /usr/weirdos/include/ \
+	$linker_flags \
+	$cpp_flags \
+	"$@"
diff --git a/clang/labs.h b/clang/labs.h
new file mode 100644
index 0000000..3dbde5c
--- /dev/null
+++ b/clang/labs.h
@@ -0,0 +1,7 @@
+#include <cstdlib>
+
+namespace std {
+	static inline long abs(long a) { return std::labs(a); }
+	static inline long long abs(long long a) { return std::labs(a); }
+}
+
diff --git a/clang/recipe.spec b/clang/recipe.spec
index 605a4eb..6eeb74f 100644
--- a/clang/recipe.spec
+++ b/clang/recipe.spec
@@ -1,14 +1,36 @@
 name: clang
 version: 8.0.1
 release: 1
-sources: https://github.com/llvm/llvm-project/releases/download/llvmorg-%{version}/cfe-%{version}.src.tar.xz
+sources:
+	- https://github.com/llvm/llvm-project/releases/download/llvmorg-%{version}/cfe-%{version}.src.tar.xz
+	- labs.h
+	- clang
+
 dirname: build
 
 @configure
+	#sed -i '/^  return ToolChain::CST_Libstdcxx/s@stdcxx@cxx@' cfe-%{version}.src/tools/lib/Driver/ToolChain.cpp
 	mkdir %{dirname}
 	cd %{dirname}
 	cmake ../cfe-%{version}.src \
-		-DCMAKE_PREFIX_PATH=/usr/bad/llvm-8 \
-		-DCMAKE_INSTALL_PREFIX=/usr \
+		-DCMAKE_PREFIX_PATH=%{prefix} \
+		-DCMAKE_INSTALL_PREFIX=%{prefix} \
+		-DCLANG_CONFIG_FILE_SYSTEM_DIR=%{prefix}/etc/clang \
+		-DCLANG_DEFAULT_CXX_STDLIB=libc++ \
+		-DCMAKE_CXX_COMPILER="clang++" \
+		-DCMAKE_CXX_FLAGS="$CXXFLAGS -stdlib=libc++ -include /usr/weirdos/include/c++/v1/math.h -include $(pwd)/../labs.h -D__DEFINED_max_align_t" \
+		-DCMAKE_C_COMPILER="clang" \
+		-DCMAKE_C_FLAGS="$CFLAGS" \
+		-DCMAKE_EXE_LINKER_FLAGS="$LDFLAGS -lc++" \
+		-DCMAKE_SHARED_LINKER_FLAGS="$LDFLAGS -lc++" \
 		-DCMAKE_BUILD_TYPE=Release
 
+
+@install
+	cd %{dirname}
+	make DESTDIR=%{pkg} install
+	mkdir -p %{pkg}/prefix/bin
+	rm %{pkg}%{prefix}/bin/clang
+	cp ../clang %{pkg}%{prefix}/bin/
+	rm %{pkg}%{prefix}/bin/clang++
+	ln -s %{prefix}/bin/clang %{pkg}%{prefix}/bin/clang++
diff --git a/clang/wrapper-clang++ b/clang/wrapper-clang++
new file mode 100644
index 0000000..dd6c100
--- /dev/null
+++ b/clang/wrapper-clang++
@@ -0,0 +1,8 @@
+#!/bin/sh
+
+clang-8 -L %{prefix}/lib \
+	-L %{prefix}/lib/gcc/x86_64-weird-linux-musl/9.1.0/ \
+	-B %{prefix}/lib/gcc/x86_64-weird-linux-musl/9.1.0/ \
+	-Wl,--dynamic-linker /lib/ld-musl-x86_64.so.1 \
+	-isystem %{prefix}/include/ \
+	"$@"
diff --git a/clang/x86_64.cfg b/clang/x86_64.cfg
new file mode 100644
index 0000000..0fde10c
--- /dev/null
+++ b/clang/x86_64.cfg
@@ -0,0 +1,4 @@
+-L /usr/weirdos/lib/gcc/x86_64-weird-linux-musl/9.1.0/
+-B /usr/weirdos/lib/gcc/x86_64-weird-linux-musl/9.1.0/
+-Wl,--dynamic-linker /lib/ld-musl-x86_64.so.1
+-I /usr/weirdos/include/