Use '|' instead of '/' as pattern delimiter in sed expression to filter

CFLAGS (Fix FTBFS).
- Modernize spec.
- Add %license.

premake.spec

@@ -1,6 +1,6 @@
 Name:           premake
 Version:        4.3
-Release:        11%{?dist}
+Release:        12%{?dist}
 Summary:        Cross-platform build configuration tool
 
 Group:          Development/Tools
@@ -11,7 +11,6 @@ Source0:        http://downloads.sourceforge.net/%{name}/premake-%{version}-src.
 Patch0:         premake-4.3-system-lua.patch
 # Add the missing manpage
 Patch1:         premake-4.3-manpage.patch
-BuildRoot:      %{_tmppath}/%{name}-%{version}-%{release}-root-%(%{__id_u} -n)
 BuildRequires:  compat-lua-devel readline-devel
 
 %description
@@ -29,9 +28,9 @@ Premake is a build configuration tool that can generate project files for:
 %patch0 -p0
 %patch1 -p0
 # Inject optflags into CFLAGS
-sed -i "s/^\s*CFLAGS\s*+=.*/CFLAGS += \$(CPPFLAGS) %{optflags}/" build/gmake.unix/Premake4.make
+sed -i "s|^\s*CFLAGS\s*+=.*|CFLAGS += \$(CPPFLAGS) %{optflags}|" build/gmake.unix/Premake4.make
 # Disable stripping the executable
-sed -i "s/^\s*LDFLAGS\s*+= -s/LDFLAGS +=/" build/gmake.unix/Premake4.make
+sed -i "s|^\s*LDFLAGS\s*+= -s|LDFLAGS +=|" build/gmake.unix/Premake4.make
 # Use the release build for running tests
 sed -i "s/debug/release/" tests/test
 
@@ -40,22 +39,24 @@ cd build/gmake.unix/
 make verbose=true %{?_smp_mflags}
 
 %install
-rm -rf %{buildroot}
 install -m 755 -Dp ./bin/release/premake4 %{buildroot}/%{_bindir}/premake4
 install -m 644 -Dp ./premake4.1 %{buildroot}/%{_mandir}/man1/premake4.1
 
-%clean
-rm -rf %{buildroot}
-
 %files
-%defattr(-,root,root,-)
 %{_bindir}/premake4
 %{_mandir}/man1/premake4.1*
-%doc LICENSE.txt README.txt CHANGES.txt
+%doc README.txt CHANGES.txt
+%license LICENSE.txt
 
 
 
 %changelog
+* Sat Jun 20 2015 Ralf Corsépius <corsepiu@fedoraproject.org> - 4.3-12
+- Use '|' instead of '/' as pattern delimiter in sed expression to filter
+  CFLAGS (Fix FTBFS).
+- Modernize spec.
+- Add %%license.
+
 * Thu Jun 18 2015 Fedora Release Engineering <rel-eng@lists.fedoraproject.org> - 4.3-11
 - Rebuilt for https://fedoraproject.org/wiki/Fedora_23_Mass_Rebuild