gcc: generic compilation, no more spec file

gcc/recipe.spec

@@ -1,7 +1,15 @@
 name: gcc
-version: 9.1.0
-release: 2
-sources: https://ftp.gnu.org/gnu/gcc/gcc-%{version}/gcc-%{version}.tar.xz
+version: 9.2.0
+release: 1
+sources:
+	- https://ftp.gnu.org/gnu/gcc/gcc-%{version}/gcc-%{version}.tar.xz
+	- specs
+
+build-dependencies:
+	- gmp-dev
+	- mpfr-dev
+	- mpc-dev
+
 dependencies:
 	- gmp
 	- mpfr
@@ -18,7 +26,13 @@ dirname: build
 		mv tmp ../gcc-%{version}/gcc/config/i386/t-linux64
 	fi
 
+	export CC=gcc
+	export CXX=g++
 	../gcc-%{version}/configure \
+		CFLAGS="$CFLAGS -isystem %{prefix}/include" \
+		CXXFLAGS="$CXXFLAGS -isystem %{prefix}/include" \
+		--with-tune=generic \
+		\
 		--prefix=%{prefix} \
 		--libdir=%{prefix}/lib \
 		--disable-multilib \
@@ -26,9 +40,8 @@ dirname: build
 		--disable-libmpx \
 		--disable-libmudflap \
 		--disable-libsanitizer \
+		--disable-bootstrap \
 		--disable-nls \
 		--disable-werror \
 		--enable-languages=c,c++ \
-		--target=x86_64-weird-linux-musl \
-		--build=x86_64-weird-linux-musl \
-		--host=x86_64-weird-linux-musl
+		--build=x86_64-weird-linux-musl