%define gcc_target_platform	%{_target_platform}
%define gcc_major_version	13

%define	branch	13
%define ver	13.3
%define rel	0

%define	build_check		0

# Avoid forcing RPM flags
#undefine _auto_set_build_flags

%{expand: %{?_without_check:	%%global build_check 0}}

# versioned libstdcxx_includedir
%define libstdcxx_includedir	%{target_cpu}-%{_real_vendor}-linux%{gnuext}/include/c++/%{branch}

# There are currently 3 alternative ways of getting the sources:
#
# 1) use the snapshot version from https://gcc.gnu.org/pub/gcc/snapshots/ (and set bcond_without use_snapshot below)
# 2) use the git version (obtained from the script %%SOURCE1)
# 3) use standard release plus patches

# with=do not use snapshot, without=use snapshot
%bcond_without use_snapshot

# with=do not use git version, without=use git version
%bcond_with use_git

# with=do not use git patch against standard release, without=use git patch against standard release
%bcond_with use_git_patch

#
# define the snapshot version to use from from https://gcc.gnu.org/pub/gcc/snapshots/
%define snapshot	20250103
#
# define the git date and hash to use current patch from release to git with %%{SOURCE1} script
%define gitpatch_date	20211113
%define gitpatch_hash	5226c9f5b0f

%if %{with use_snapshot}
%define source_package		gcc-%{branch}-%{snapshot}
%define source_dir		gcc-%{branch}-%{snapshot}
%else
%define source_package		gcc-%{version}
%define source_dir		gcc-%{version}
%endif

Summary:	Compatible GNU Compiler Collection v11.x
Name:		compat-cuda-gcc13
Version:	%{ver}
%if %{with use_snapshot}
Release:	%mkrel %rel.%{snapshot}
%else
%if %{with use_git}
Release:	%mkrel %rel.%{gitdate}.git
%else
%if %{with use_patch}
Release:	%mkrel %rel.%{gitpatch_date}.gitpatch
%else
Release:	%mkrel %rel
%endif
%endif
%endif
License:	GPLv3+
Group:		Development/C
URL:		https://gcc.gnu.org/
%if %{with use_snapshot}
Source0:	https://gcc.gnu.org/pub/gcc/snapshots/%{branch}-%{snapshot}/gcc-%{branch}-%{snapshot}.tar.xz
%else
%if %{with use_git}
# current git version (get with %%SOURCE1 script)
Source:		gcc-%{version}-%{gitdate}.git.%{githash}.tar.xz
%else
# standard release source
Source0:	https://ftpmirror.gnu.org/gcc/gcc-%{version}/gcc-%{version}.tar.xz
%endif
%endif
# script for getting the current git version or diff from a tagged release
Source1:	gcc-%{branch}-get-from-git.sh

# Patches
#
# From git://gcc.gnu.org/git/gcc.git
#
# upstream gcc-9 branch, numbered from 1
%if %{with use_gitpatch}
Patch1:		gcc-%{version}-%{gitpatch_date}.git.%{gitpatch_hash}.patch
%endif

# upstream master branch, numbered from 101

# Mageia patches, numbered from 201
#
# build 32 bits code when running through linux32
Patch201:	gcc-11.2-linux32-new.patch
# slibdir is either /lib or /lib64
Patch202:	gcc-11.2-pass-slibdir.patch
# pass libdir around
Patch203:	gcc-11.2-multi-do-libdir.patch
#
# Fedora patches, numbered from 501
# "fix" liberated from Fedora
# Fedora technical explanation: "libtool sucks"
# TODO: really figure it out
#Patch504:       gcc-11.2-libtool-no-rpath.patch

%define binutils_version 1:2.33.1-1

BuildRequires:	python3
Requires:	binutils >= %{binutils_version}
BuildRequires:	binutils >= %{binutils_version}

BuildRequires:	gcc >= 8.3.0-1
# c++ is mandatory to build gcc
BuildRequires:	gcc-c++ >= 8.3.0-1
# make sure gdb will understand DW_FORM_strp
Conflicts:	gdb < 5.1.1
BuildRequires:	chrpath
BuildRequires:	zlib-devel

# isl is used for Graphite support (optimizations)
# see https://gcc.gnu.org/wiki/Graphite
BuildRequires:	isl-devel >= 0.14
# needed for lto support
BuildRequires:	elfutils-devel

BuildRequires:	gettext
BuildRequires:	flex
BuildRequires:	bison
BuildRequires:	texinfo >= 4.1
BuildRequires:	texinfo-tex
# needs a GNU awk recent enough to correctly generate options.h
BuildRequires:	gawk >= 3.1.4
Requires:	glibc-devel >= 2.4-1
BuildRequires:	glibc-devel >= 2.4-1
# for make check
%if %{build_check}
BuildRequires:	glibc-static-devel
BuildRequires:	autogen
BuildRequires:	dejagnu
BuildRequires:	pkgconfig(libzstd)
BuildRequires:	sharutils
#BuildRequires:	systemtap
%endif
#
BuildRequires:	gmp-devel
BuildRequires:	pkgconfig(mpfr)
BuildRequires:	libmpc-devel

AutoReq:	false
AutoProv:	false

ExclusiveArch:	x86_64
Obsoletes: 	compat-cuda-gcc9 < %{version}-%{release} 
Provides:	compat-cuda-gcc9 = %{version}-%{release}
Obsoletes:	compat-cuda-gcc11 < %{version}-%{release}
Provides:	compat-cuda-gcc11 = %{version}-%{release}

%description
A compiler aimed at integrating all the optimizations and features
necessary for a high-performance and stable development environment.
This package is required for all other GCC compilers, namely C++,
Fortran 95.

This is a special gcc version for compatibility with cuda-11.8. Example of
usage with nvcc:

	nvcc -ccbin g++-13
	nvcc -ccbin gcc-13


%prep
%setup -q -n %{source_dir}
%autopatch -p1

%build
%define python_dir %(echo "%{python3_sitelib}" | sed 's!^%{_prefix}!!g')

# Prepare OPT_FLAGS
OPT_FLAGS=$(echo %{optflags} | sed -e 's/-fno-rtti//g' -e 's/-fno-exceptions//g' -e 's/-mcpu=pentiumpro//g')
# "-Wformat -Werror=format-security" from the above flags causes some fail 
# in "libcpp/macro.c:164:23: error: format not a string literal". Drop for now. To be reviewed.
OPT_FLAGS=$(echo $OPT_FLAGS | sed -e 's/-Wformat//g' -e 's/-Werror=format-security//g')

# Simpler flags: "-O2 -g -pipe" for now.
#OPT_FLAGS="-O2 -g -pipe"

# don't build crt files with -fasynchronous-unwind-tables
case " $OPT_FLAGS " in
*" -fasynchronous-unwind-tables "*)
  perl -pi -e 's/-fno-exceptions /-fno-exceptions -fno-asynchronous-unwind-tables /' gcc/Makefile.in
  ;;
esac

# Force a seperate object dir
rm -rf obj-%{gcc_target_platform}
mkdir obj-%{gcc_target_platform}
cd obj-%{gcc_target_platform}

LANGUAGES="c,c++,fortran,lto"
LANGUAGES="c,c++,lto"
LIBSTDCXX_FLAGS="--enable-long-long --enable-__cxa_atexit --disable-libunwind-exceptions --enable-clocale=gnu"
#LIBSTDCXX_FLAGS="$LIBSTDCXX_FLAGS --with-gxx-include-dir=%{libstdcxx_includedir}"
SSP_FLAGS="--enable-ssp --disable-libssp"
ISL_FLAGS="--with-isl"
LIBFFI_FLAGS="--disable-libffi"
LIBC_FLAGS="--enable-threads=posix --with-linker-hash-style=gnu --enable-shared"
# target specific flags
#CROSS_FLAGS="--target=%{gcc_target_platform}"
TARGET_FLAGS="--with-cpu=generic"
#PROGRAM_SUFFIX="--program-suffix=-%{gcc_major_version}"

%define python_dir %(echo "%{python3_sitelib}" | sed 's!^%{_prefix}!!g')

CC="%{__cc}" \
CFLAGS="$OPT_FLAGS" \
CXXFLAGS="$OPT_FLAGS" \
XCFLAGS="$OPT_FLAGS" \
TCFLAGS="$OPT_FLAGS" \
EGREP="grep -E" \
	../configure \
	--prefix=%{_prefix}/lib/%{name} \
	--libexecdir=%{_prefix}/lib/%{name}/lib \
	--with-slibdir=/%{_lib} \
	--with-pkgversion="Mageia %{version}-%{release}" \
	--with-bugurl=https://bugs.mageia.org/ \
	--enable-checking=release \
	--enable-languages="$LANGUAGES" \
	--enable-linker-build-id \
	--build=%{_target_platform} \
	--host=%{_target_platform} \
	$CROSS_FLAGS \
	$TARGET_FLAGS \
	$PROGRAM_SUFFIX \
	$LIBC_FLAGS \
	$LIBOBJC_FLAGS \
	$LIBSTDCXX_FLAGS \
	$SSP_FLAGS \
	$ISL_FLAGS \
	$LIBFFI_FLAGS \
	$LIBGOMP_FLAGS \
	$QUADMATH_FLAGS \
	--with-system-zlib \
	--disable-werror \
	--with-python-dir=%{python_dir} \
	--enable-lto \
	--with-gcc-major-version-only
touch ../gcc/c-gperf.h
tick=$SECONDS

# bootstrap-lean is similar to bootstrap except "object files from the stage1
# and stage2 of the 3-stage bootstrap of the compiler are deleted as soon as
# they are no longer needed."
%make_build bootstrap-lean BOOT_CFLAGS="$OPT_FLAGS"

#make_build

tock=$SECONDS
elapsed=$(( $tock - $tick ))
echo "Compilation time duration: $elapsed seconds"
cd ..

%check
%if %{build_check}
echo =================== BEGIN TESTING ==================
pushd obj-%{gcc_target_platform}
  tick=$SECONDS
  export LC_ALL=C
  %make_build -k check || true
  tock=$SECONDS
  elapsed=$(( $tock - $tick ))
  echo "Testing time duration: $elapsed seconds"
  ../contrib/test_summary > ../test_summary.log
popd
echo =================== END TESTING ====================
%endif
 
%install
export QA_RPATHS=0x0020
pushd obj-%{gcc_target_platform}
  %make_install
popd

# expose versioned links to bindir
install -m 755 -d %{buildroot}%{_bindir}

for i in \
	cpp \
	g++ \
	gcc \
	gcc-ar \
	gcc-nm \
	gcc-ranlib \
	gfortran \
	x86_64-mageia-linux-gnu-ar \
	x86_64-mageia-linux-gnu-gcc \
	x86_64-mageia-linux-gnu-nm \
	x86_64-mageia-linux-gnu-ranlib \
	x86_64-mageia-linux-gnu-fortran \
	; do
		ln -sf %{_prefix}/lib/%{name}/bin/$i %{buildroot}%{_bindir}/$i-%{branch}
done

%files
%license gcc/COPYING
%doc gcc/*ChangeLog*
%if %{build_check}
%doc test_summary.log
%endif
%{_bindir}/*
%{_prefix}/lib/%{name}