# -*- coding: utf-8; mode: tcl; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- vim:fenc=utf-8:filetype=tcl:et:sw=4:ts=4:sts=4

PortSystem                            1.0
PortGroup select                      1.0
PortGroup compiler_blacklist_versions 1.0
PortGroup xcodeversion                1.0
PortGroup conflicts_build             1.0
PortGroup xcode_workaround            1.0

name                gcc6
epoch               3
version             6.5.0
revision            7
subport             libgcc6 { revision 4 }
platforms           darwin
categories          lang
maintainers         nomaintainer
# an exception in the license allows dependents to not be GPL
license             {GPL-3+ Permissive}
description         The GNU compiler collection
long_description    The GNU compiler collection, including front ends for \
                    C, C++, Objective-C, Objective-C++ and Fortran.

homepage            https://gcc.gnu.org/
master_sites        ftp://ftp.funet.fi/pub/mirrors/sources.redhat.com/pub/gcc/releases/gcc-${version}/ \
                    ftp://ftp.gwdg.de/pub/linux/gcc/releases/gcc-${version}/ \
                    ftp://gcc.ftp.nluug.nl/mirror/languages/gcc/releases/gcc-${version}/ \
                    ftp://gcc.gnu.org/pub/gcc/releases/gcc-${version}/ \
                    gnu:gcc/gcc-${version}

distname            gcc-${version}
use_xz              yes

checksums           rmd160  66782b17cff89f22e5e8869fa96bd9a8985f5067 \
                    sha256  7ef1796ce497e89479183702635b14bb7a46b53249209a5e0f999bebf4740945 \
                    size    74355588

set isLastSupported [ expr ${os.major} < 11 ]

if { ${configure.build_arch} eq "i386" && ${os.major} >= 10 } {

    # fix no-pie clang bug bootstrapping gcc on i386
    # https://trac.macports.org/ticket/63161
    patchfiles-append  patch-gcc7-i686-clang-bootstrap-fix.diff

    # build with traditional "gas" assembler in all cases
    # upstream does not typically test gcc with clang as assembler on i386 systems
    # gcc configuration changes with assembler features
    # also innumerable warnings about text section naming suppressed
    patchfiles-append  patch-gcc7-disable-macports-cctools-as-changes.diff

    configure.env-append \
      "DISABLE_MACPORTS_AS_CLANG_SEARCH=1" \
      "DISABLE_XCODE_AS_CLANG_SEARCH=1"

    build.env-append \
      "DISABLE_MACPORTS_AS_CLANG_SEARCH=1" \
      "DISABLE_XCODE_AS_CLANG_SEARCH=1"
}

# fix for PPC SnowLeopard idiosyncracies
if {${os.major} == 10 && ${configure.build_arch} eq "ppc"} {
    patchfiles-append   patch-gcc6-darwin-config-for-PPCSL.diff
}

depends_lib         port:cctools \
                    port:gmp \
                    path:lib/pkgconfig/isl.pc:isl \
                    port:ld64 \
                    port:zlib \
                    port:libiconv \
                    port:libmpc \
                    port:mpfr
depends_run         port:gcc_select
depends_run-append  path:share/doc/libgcc/README:libgcc

depends_skip_archcheck-append gcc_select ld64 cctools
license_noconflict  gmp mpfr ppl libmpc

# Work around parallel building issue on APFS
# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81797
patchfiles-append   notparallel-install-headers.patch

if {[vercmp ${xcodeversion} 10.2] >= 0} {
    # https://trac.macports.org/ticket/58260
    # Patch for Xcode bug, taken from
    # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89864#c43
    # https://github.com/Homebrew/homebrew-core/pull/39134/files
    # This should be removed in the next release of GCC
    patchfiles-append   xcode-bug-_Atomic-fix.patch
}

set major           [lindex [split ${version} .-] 0]

platform darwin {
    configure.pre_args-append --build=${build_arch}-apple-darwin${os.major}

    # see https://gcc.gnu.org/ml/gcc-patches/2012-05/msg00672.html
    patchfiles-append         patch-float128.diff
}

# fix build on Tiger Intel - same patch as gcc7 / libgcc works
platform darwin 8 i386 {
    patchfiles-append patch-gcc7-tiger-intel.diff
}

configure.dir       ${workpath}/build
configure.cmd       ${worksrcpath}/configure
configure.args      --enable-languages=c,c++,objc,obj-c++,lto,fortran \
                    --libdir=${prefix}/lib/${name} \
                    --includedir=${prefix}/include/${name} \
                    --infodir=${prefix}/share/info \
                    --mandir=${prefix}/share/man \
                    --datarootdir=${prefix}/share/gcc-${major} \
                    --with-local-prefix=${prefix} \
                    --with-system-zlib \
                    --disable-nls \
                    --program-suffix=-mp-${major} \
                    --with-gxx-include-dir=${prefix}/include/${name}/c++/ \
                    --with-gmp=${prefix} \
                    --with-mpfr=${prefix} \
                    --with-mpc=${prefix} \
                    --with-isl=${prefix} \
                    --enable-stage1-checking \
                    --disable-multilib \
                    --enable-lto \
                    --enable-libstdcxx-time \
                    --with-build-config=bootstrap-debug \
                    --with-as=${prefix}/bin/as \
                    --with-ld=${prefix}/bin/ld \
                    --with-ar=${prefix}/bin/ar \
                    --with-bugurl=https://trac.macports.org/newticket

# see https://lists.macports.org/pipermail/macports-dev/2017-August/036209.html
# --disable-tls does not limit functionality
# it only determines how std::call_once works
configure.args-append \
                    --disable-tls

configure.env-append \
                    AR_FOR_TARGET=${prefix}/bin/ar \
                    AS_FOR_TARGET=${prefix}/bin/as \
                    LD_FOR_TARGET=${prefix}/bin/ld \
                    NM_FOR_TARGET=${prefix}/bin/nm \
                    OBJDUMP_FOR_TARGET=${prefix}/bin/objdump \
                    RANLIB_FOR_TARGET=${prefix}/bin/ranlib \
                    STRIP_FOR_TARGET=${prefix}/bin/strip \
                    OTOOL=${prefix}/bin/otool \
                    OTOOL64=${prefix}/bin/otool

pre-configure {
    configure.args-append --with-pkgversion="MacPorts ${name} ${version}_${revision}${portvariants}"

    if {${configure.sdkroot} ne ""} {
        # We should be using --with-build-sysroot here.  Using --with-sysroot
        # changes the behavior of the installed gcc to look in that sysroot
        # by default instead of /.  Using --with-build-sysroot is supposed
        # to be used during the build but not impact the installed product.
        # Unfortunately, the build fails because the value doesn't get
        # plumbed everywhere it is supposed to.
        #
        # https://trac.macports.org/ticket/53726
        # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79885
        #
        # Note that macports toolchains will fail to compile gcc unless
        # the DevSDK is installed due to another gcc build system bug:
        # https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80203
        configure.args-append --with-sysroot="${configure.sdkroot}"
    }

    # TODO: Remove when base automatically creates configure.dir (2.2.1?).
    file mkdir ${configure.dir}
}

# gcc cannot build if libunwind-headers is active
conflicts_build-append libunwind-headers

# http://trac.macports.org/ticket/29067
compiler.blacklist-append gcc-4.0

# http://trac.macports.org/ticket/29104
compiler.blacklist-append {llvm-gcc-4.2 < 2336.1}

# https://trac.macports.org/ticket/47996
compiler.blacklist-append *clang*

# "-stdlib" would be passed on to the bootstrap compiler if present
configure.cxx_stdlib

build.dir           ${configure.dir}
build.target        bootstrap-lean
use_parallel_build  yes

destroot.target     install install-info-host

# On Darwin19+ fails to build for Xcode < 11.3
# https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90835
# https://trac.macports.org/ticket/59351
# for more background on the issue.
if { ${os.major} >= 19 } {
    if {[vercmp ${xcodeversion} 11.3] < 0} {
        known_fail  yes
        pre-fetch {
            ui_error "${name} ${version} is (currently) not supported on Darwin ${os.major} Xcode ${xcodeversion}"
            ui_error "See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90835 and"
            ui_error "    https://trac.macports.org/ticket/59351 for more details"
            ui_error "To install this port upgrade Xcode to 11.3 or newer"
            return -code error "incompatible Xcode version"
        }
    }
}

if {${subport} eq "libgcc6"} {
	    # http://trac.macports.org/ticket/35770
	    # http://trac.macports.org/ticket/38814
	    # While there can be multiple versions of these runtimes in a single
	    # process, it is not possible to pass objects between different versions,
	    # so we simplify this by having the libgcc port provide the newest version
	    # of these runtimes for all versions of gcc to use.
	    #
	    # If there is a binary incompatible change to the runtime in a future
	    # version of gcc, then the latest version of gcc to provide a given ABI
	    # version should continue to provide a subport for that and older gcc
	    # versions.
	
	    depends_run port:libgcc7
	    depends_build-append {*}${depends_lib}
	    depends_lib
	
	    configure.args-replace \
	        --libdir=${prefix}/lib/${name} \
	        --libdir=${prefix}/lib/libgcc
	
	    configure.args-replace \
	        --enable-languages=c,c++,objc,obj-c++,lto,fortran \
	        --enable-languages=fortran
	
	    # TODO: Possibly disable bootstrap with appropriate configure flags.
	    #       the problem is that libstdc++'s configure script tests for tls support
	    #       using the running compiler (not gcc for which libstdc++ is being built).
	    #       Thus when we build with clang, we get a mismatch
	    # http://trac.macports.org/ticket/36116
	    #compiler.blacklist-append {clang < 425}
	    #configure.args-append --disable-bootstrap
	    #build.target        all
	
	    post-destroot {
	        file mkdir ${destroot}${prefix}/lib/libgcc.merged
	
	        # We need to list libquadmath.0.dylib here even though it isn't installed in order to make sure we cleanup libgfortran.3.dylib's linkage when +universal
	        # See https://trac.macports.org/ticket/54768
	        set dylibs {libgfortran.3.dylib libquadmath.0.dylib libasan.3.dylib}
	
	        foreach dylib ${dylibs} {
	            # Different OS versions (e.g. Leopard) or architectures (e.g. PPC) don't produce all the dylibs
	            # https://trac.macports.org/ticket/40098
	            # https://trac.macports.org/ticket/40100
	            if {! [file exists ${destroot}${prefix}/lib/libgcc/${dylib}]} {
	                continue
	            }
	
	            move ${destroot}${prefix}/lib/libgcc/${dylib} ${destroot}${prefix}/lib/libgcc.merged
	            if {[variant_exists universal] && [variant_isset universal]} {
	                foreach archdir [glob ${destroot}${prefix}/lib/libgcc/*/] {
	                    set archdir_nodestroot [string map "${destroot}/ /" ${archdir}]
	                    if {[file exists ${archdir}/${dylib}]} {
	                        system "install_name_tool -id ${prefix}/lib/libgcc/${dylib} ${archdir}/${dylib}"
	                        foreach link [glob -tails -directory ${archdir} *.dylib] {
	                            system "install_name_tool -change ${archdir_nodestroot}${link} ${prefix}/lib/libgcc/${link} ${archdir}/${dylib}"
	                        }
	                        system "lipo -create -output ${destroot}${prefix}/lib/libgcc.merged/${dylib}~ ${destroot}${prefix}/lib/libgcc.merged/${dylib} ${archdir}/${dylib} && mv ${destroot}${prefix}/lib/libgcc.merged/${dylib}~ ${destroot}${prefix}/lib/libgcc.merged/${dylib}"
	                    }
	                }
	            }
	
	            # strip debug symbols to supress debugger warnings:
	            # http://trac.macports.org/attachment/ticket/34831
	            if {! [string match *libgcc_ext* ${dylib}]} {
	                system "strip -x ${destroot}${prefix}/lib/libgcc.merged/${dylib}"
	            }
	        }
	
	        file delete -force ${destroot}${prefix}/bin
	        file delete -force ${destroot}${prefix}/share
	        file delete -force ${destroot}${prefix}/include
	        file delete -force ${destroot}${prefix}/lib/libgcc
	        file delete -force ${destroot}${prefix}/libexec
	
	        move ${destroot}${prefix}/lib/libgcc.merged ${destroot}${prefix}/lib/libgcc
	
	        # This is provided by the libgcc port
	        file delete -force ${destroot}${prefix}/lib/libgcc/libquadmath.0.dylib
	    }
	
	} else {
	    post-destroot {
	        file delete ${destroot}${prefix}/share/info/dir
	
	        foreach file [glob ${destroot}${prefix}/share/{info,man/man7}/*] {
	            set extension [file extension ${file}]
	            set newfile [regsub "${extension}$" ${file} "-mp-${major}${extension}"]
	
	            file rename ${file} ${newfile}
	        }
	
	        foreach dylib {libgcc_ext.10.4.dylib libgcc_ext.10.5.dylib libgcc_s.1.dylib libgfortran.3.dylib libquadmath.0.dylib libstdc++.6.dylib libobjc-gnu.4.dylib libgomp.1.dylib libitm.1.dylib libssp.0.dylib libasan.3.dylib libatomic.1.dylib} {
	            # Different OS versions (e.g. Leopard) or architectures (e.g. PPC) don't produce all the dylibs
	            # https://trac.macports.org/ticket/40098
	            # https://trac.macports.org/ticket/40100
	            if {[file exists ${destroot}${prefix}/lib/${name}/${dylib}]} {
	                delete ${destroot}${prefix}/lib/${name}/${dylib}
	                ln -s ${prefix}/lib/libgcc/${dylib} ${destroot}${prefix}/lib/${name}/${dylib}
	            }
	
	            if {[variant_exists universal] && [variant_isset universal]} {
	                foreach archdir [glob ${destroot}${prefix}/lib/${name}/*/] {
	                    if {[file exists ${archdir}/${dylib}]} {
	                        delete ${archdir}/${dylib}
	                        ln -s ${prefix}/lib/libgcc/${dylib} ${archdir}/${dylib}
	                    }
	                }
	            }
	        }
	    }
	
	    select.group        gcc
	    select.file         ${filespath}/mp-${name}
	
	}
	
	platform powerpc {
	    configure.universal_archs ppc ppc64
	}
	platform i386 {
	    configure.universal_archs i386 x86_64
	}
	variant universal {
	    configure.args-delete --disable-multilib
	}
	# the generated compiler doesn't accept -arch
	configure.env-append \
	    "CPP=${configure.cc} -E" \
	    "CXXCPP=${configure.cxx} -E"
	build.env-append \
	    "CPP=${configure.cc} -E" \
	    "CXXCPP=${configure.cxx} -E"
	configure.cc-append [get_canonical_archflags]
	configure.cc_archflags
	configure.cxx-append ${configure.cxx_archflags}
	configure.cxx_archflags
	configure.objc_archflags
	configure.ld_archflags
	configure.universal_cflags
	configure.universal_cxxflags
	configure.universal_ldflags
	configure.universal_args
	
	livecheck.type      regex
	livecheck.url       https://ftp.gnu.org/gnu/gcc/
	livecheck.regex     gcc-(${major}\\.\[0-9.\]+)/