macOS packaging: install Homebrew + GCC under /Applications/Dynare/<<version>>

The installation of Homebrew + GCC necessitates Xcode Command Line Tools, which will be installed if it is not present.

The installation of Homebrew + GCC is optional and can be deselected by the user.

macOS/brewfiles/gcc.rb

+class Gcc < Formula
+  desc "GNU compiler collection"
+  homepage "https://gcc.gnu.org/"
+  url "https://ftp.gnu.org/gnu/gcc/gcc-9.2.0/gcc-9.2.0.tar.xz"
+  mirror "https://ftpmirror.gnu.org/gcc/gcc-9.2.0/gcc-9.2.0.tar.xz"
+  sha256 "ea6ef08f121239da5695f76c9b33637a118dcf63e24164422231917fa61fb206"
+  revision 2
+  head "https://gcc.gnu.org/git/gcc.git"
+
+  bottle do
+    root_url "https://homebrew.bintray.com/bottles"
+    cellar :any
+    sha256 "1564397f461f629f3811f1ececc7f2bb614f7520242743fc41348d190d8b6aa9" => :catalina
+    sha256 "5012d43ce3ff9b31fc21f9df1075b9d5e205d1a727b75f6dbd098654aff0f0f2" => :mojave
+    sha256 "cc0e6c6a7f7ce5823d0578cf57a6e201727238905aa8a4726e5f90dbc252d94b" => :high_sierra
+  end
+
+  # The bottles are built on systems with the CLT installed, and do not work
+  # out of the box on Xcode-only systems due to an incorrect sysroot.
+  pour_bottle? do
+    reason "The bottle needs the Xcode CLT to be installed."
+    satisfy { MacOS::CLT.installed? }
+  end
+
+  depends_on "gmp"
+  depends_on "isl"
+  depends_on "libmpc"
+  depends_on "mpfr"
+
+  # GCC bootstraps itself, so it is OK to have an incompatible C++ stdlib
+  cxxstdlib_check :skip
+
+  # Fix system headers for Catalina SDK
+  # (otherwise __OSX_AVAILABLE_STARTING ends up undefined)
+  if DevelopmentTools.clang_build_version >= 1100
+    patch do
+      url "https://raw.githubusercontent.com/Homebrew/formula-patches/b8b8e65e/gcc/9.2.0-catalina.patch"
+      sha256 "0b8d14a7f3c6a2f0d2498526e86e088926671b5da50a554ffa6b7f73ac4f132b"
+    end
+  end
+
+  def version_suffix
+    if build.head?
+      "HEAD"
+    else
+      version.to_s.slice(/\d/)
+    end
+  end
+
+  def install
+    # GCC will suffer build errors if forced to use a particular linker.
+    ENV.delete "LD"
+
+    # We avoiding building:
+    #  - Ada, which requires a pre-existing GCC Ada compiler to bootstrap
+    #  - Go, currently not supported on macOS
+    #  - BRIG
+    languages = %w[c c++ objc obj-c++ fortran]
+
+    osmajor = `uname -r`.split(".").first
+    pkgversion = "Homebrew GCC #{pkg_version} #{build.used_options*" "}".strip
+
+    args = %W[
+      --build=x86_64-apple-darwin#{osmajor}
+      --prefix=#{prefix}
+      --libdir=#{lib}/gcc/#{version_suffix}
+      --disable-nls
+      --enable-checking=release
+      --enable-languages=#{languages.join(",")}
+      --program-suffix=-#{version_suffix}
+      --with-gmp=#{Formula["gmp"].opt_prefix}
+      --with-mpfr=#{Formula["mpfr"].opt_prefix}
+      --with-mpc=#{Formula["libmpc"].opt_prefix}
+      --with-isl=#{Formula["isl"].opt_prefix}
+      --with-system-zlib
+      --with-pkgversion=#{pkgversion}
+      --with-bugurl=https://github.com/Homebrew/homebrew-core/issues
+    ]
+
+    # Xcode 10 dropped 32-bit support
+    args << "--disable-multilib" if DevelopmentTools.clang_build_version >= 1000
+
+    # Ensure correct install names when linking against libgcc_s;
+    # see discussion in https://github.com/Homebrew/legacy-homebrew/pull/34303
+    inreplace "libgcc/config/t-slibgcc-darwin", "@shlib_slibdir@", "#{HOMEBREW_PREFIX}/lib/gcc/#{version_suffix}"
+
+    mkdir "build" do
+      if !MacOS::CLT.installed?
+        # For Xcode-only systems, we need to tell the sysroot path
+        args << "--with-native-system-header-dir=/usr/include"
+        args << "--with-sysroot=#{MacOS.sdk_path}"
+      elsif MacOS.version >= :mojave
+        # System headers are no longer located in /usr/include
+        args << "--with-native-system-header-dir=/usr/include"
+        args << "--with-sysroot=/Library/Developer/CommandLineTools/SDKs/MacOSX#{MacOS.version}.sdk"
+      end
+
+      system "../configure", *args
+
+      # Use -headerpad_max_install_names in the build,
+      # otherwise updated load commands won't fit in the Mach-O header.
+      # This is needed because `gcc` avoids the superenv shim.
+      system "make", "BOOT_LDFLAGS=-Wl,-headerpad_max_install_names"
+      system "make", "install"
+
+      bin.install_symlink bin/"gfortran-#{version_suffix}" => "gfortran"
+    end
+
+    # Handle conflicts between GCC formulae and avoid interfering
+    # with system compilers.
+    # Rename man7.
+    Dir.glob(man7/"*.7") { |file| add_suffix file, version_suffix }
+    # Even when we disable building info pages some are still installed.
+    info.rmtree
+  end
+
+  def add_suffix(file, suffix)
+    dir = File.dirname(file)
+    ext = File.extname(file)
+    base = File.basename(file, ext)
+    File.rename file, "#{dir}/#{base}-#{suffix}#{ext}"
+  end
+
+  test do
+    (testpath/"hello-c.c").write <<~EOS
+      #include <stdio.h>
+      int main()
+      {
+        puts("Hello, world!");
+        return 0;
+      }
+    EOS
+    system "#{bin}/gcc-#{version_suffix}", "-o", "hello-c", "hello-c.c"
+    assert_equal "Hello, world!\n", `./hello-c`
+
+    (testpath/"hello-cc.cc").write <<~EOS
+      #include <iostream>
+      int main()
+      {
+        std::cout << "Hello, world!" << std::endl;
+        return 0;
+      }
+    EOS
+    system "#{bin}/g++-#{version_suffix}", "-o", "hello-cc", "hello-cc.cc"
+    assert_equal "Hello, world!\n", `./hello-cc`
+
+    (testpath/"test.f90").write <<~EOS
+      integer,parameter::m=10000
+      real::a(m), b(m)
+      real::fact=0.5
+
+      do concurrent (i=1:m)
+        a(i) = a(i) + fact*b(i)
+      end do
+      write(*,"(A)") "Done"
+      end
+    EOS
+    system "#{bin}/gfortran", "-o", "test", "test.f90"
+    assert_equal "Done\n", `./test`
+  end
+end

macOS/brewfiles/gmp.rb

+class Gmp < Formula
+  desc "GNU multiple precision arithmetic library"
+  homepage "https://gmplib.org/"
+  url "https://gmplib.org/download/gmp/gmp-6.1.2.tar.xz"
+  mirror "https://ftp.gnu.org/gnu/gmp/gmp-6.1.2.tar.xz"
+  sha256 "87b565e89a9a684fe4ebeeddb8399dce2599f9c9049854ca8c0dfbdea0e21912"
+  revision 2
+
+  bottle do
+    root_url "https://homebrew.bintray.com/bottles"
+    cellar :any
+    rebuild 1
+    sha256 "2409417943fceda33eac12a8229fbf7b990eee18ee341b543be575550a077bb0" => :catalina
+    sha256 "84f74594086bccc53bdb141f4d06d7847680374e255ebe016654da1e47db2dfc" => :mojave
+    sha256 "a536c51149806b73b2e1178be94300832b6b151455006bc7f2a32b9dc493c7a3" => :high_sierra
+    sha256 "ada22a8bbfe8532d71f2b565e00b1643beaf72bff6b36064cbad0cd7436e4948" => :sierra
+  end
+
+  def install
+    # Work around macOS Catalina / Xcode 11 code generation bug
+    # (test failure t-toom53, due to wrong code in mpn/toom53_mul.o)
+    ENV.append_to_cflags "-fno-stack-check"
+
+    # Enable --with-pic to avoid linking issues with the static library
+    args = %W[--prefix=#{prefix} --enable-cxx --with-pic]
+    args << "--build=#{Hardware.oldest_cpu}-apple-darwin#{`uname -r`.to_i}"
+    system "./configure", *args
+    system "make"
+    system "make", "check"
+    system "make", "install"
+  end
+
+  test do
+    (testpath/"test.c").write <<~EOS
+      #include <gmp.h>
+      #include <stdlib.h>
+
+      int main() {
+        mpz_t i, j, k;
+        mpz_init_set_str (i, "1a", 16);
+        mpz_init (j);
+        mpz_init (k);
+        mpz_sqrtrem (j, k, i);
+        if (mpz_get_si (j) != 5 || mpz_get_si (k) != 1) abort();
+        return 0;
+      }
+    EOS
+
+    system ENV.cc, "test.c", "-L#{lib}", "-lgmp", "-o", "test"
+    system "./test"
+
+    # Test the static library to catch potential linking issues
+    system ENV.cc, "test.c", "#{lib}/libgmp.a", "-o", "test"
+    system "./test"
+  end
+end

macOS/brewfiles/isl.rb

+class Isl < Formula
+  desc "Integer Set Library for the polyhedral model"
+  homepage "https://isl.gforge.inria.fr/"
+  # Note: Always use tarball instead of git tag for stable version.
+  #
+  # Currently isl detects its version using source code directory name
+  # and update isl_version() function accordingly.  All other names will
+  # result in isl_version() function returning "UNKNOWN" and hence break
+  # package detection.
+  url "http://isl.gforge.inria.fr/isl-0.21.tar.xz"
+  mirror "https://deb.debian.org/debian/pool/main/i/isl/isl_0.21.orig.tar.xz"
+  sha256 "777058852a3db9500954361e294881214f6ecd4b594c00da5eee974cd6a54960"
+
+  bottle do
+    root_url "https://homebrew.bintray.com/bottles"
+    cellar :any
+    sha256 "1f42c08dd84a2f418c8446be2679f027d8b1250d337b5e3135c401eba578cbb7" => :catalina
+    sha256 "f9188b5d486b2a835cd865f219be1a9848ce3926e27089a1538ee989db65447d" => :mojave
+    sha256 "d997d49958218e521bc4f73369414ff9fad040d28601d94012e4c68cd090ea93" => :high_sierra
+    sha256 "d5dc353916cd98da04552a3d7cb86a3203612df422c4e9389e13e12f86945865" => :sierra
+  end
+
+  head do
+    url "https://repo.or.cz/isl.git"
+
+    depends_on "autoconf" => :build
+    depends_on "automake" => :build
+    depends_on "libtool" => :build
+  end
+
+  depends_on "gmp"
+
+  def install
+    system "./autogen.sh" if build.head?
+    system "./configure", "--disable-dependency-tracking",
+                          "--disable-silent-rules",
+                          "--prefix=#{prefix}",
+                          "--with-gmp=system",
+                          "--with-gmp-prefix=#{Formula["gmp"].opt_prefix}"
+    system "make", "check"
+    system "make", "install"
+    (share/"gdb/auto-load").install Dir["#{lib}/*-gdb.py"]
+  end
+
+  test do
+    (testpath/"test.c").write <<~EOS
+      #include <isl/ctx.h>
+
+      int main()
+      {
+        isl_ctx* ctx = isl_ctx_alloc();
+        isl_ctx_free(ctx);
+        return 0;
+      }
+    EOS
+    system ENV.cc, "test.c", "-L#{lib}", "-lisl", "-o", "test"
+    system "./test"
+  end
+end

macOS/brewfiles/libmpc.rb

+class Libmpc < Formula
+  desc "C library for the arithmetic of high precision complex numbers"
+  homepage "http://www.multiprecision.org/mpc/"
+  url "https://ftp.gnu.org/gnu/mpc/mpc-1.1.0.tar.gz"
+  sha256 "6985c538143c1208dcb1ac42cedad6ff52e267b47e5f970183a3e75125b43c2e"
+
+  bottle do
+    root_url "https://homebrew.bintray.com/bottles"
+    cellar :any
+    sha256 "b9491bbc04d1e52dfb8311dc9aa0081fd3041cb6b2f6b59a4104d712d341979d" => :catalina
+    sha256 "1cb3a09238830d45d64a87f520f06122d24a020403fac1800c831d15c605282e" => :mojave
+    sha256 "3b28ec506ab53ef5f3163e87fb72ae735b7f91ee2fc20fe184cf1241481b72a5" => :high_sierra
+    sha256 "18d620a1612bc51b1fbd1b3b62c9c73766b90549c746740c5a27d2ab1ec5ede7" => :sierra
+    sha256 "6f19f936781dae0db248abdd84a72c3e25451c44379706bc3800760f0aa43888" => :el_capitan
+  end
+
+  depends_on "gmp"
+  depends_on "mpfr"
+
+  def install
+    args = %W[
+      --prefix=#{prefix}
+      --disable-dependency-tracking
+      --with-gmp=#{Formula["gmp"].opt_prefix}
+      --with-mpfr=#{Formula["mpfr"].opt_prefix}
+    ]
+
+    system "./configure", *args
+    system "make"
+    system "make", "check"
+    system "make", "install"
+  end
+
+  test do
+    (testpath/"test.c").write <<~EOS
+      #include <mpc.h>
+      #include <assert.h>
+      #include <math.h>
+
+      int main() {
+        mpc_t x;
+        mpc_init2 (x, 256);
+        mpc_set_d_d (x, 1., INFINITY, MPC_RNDNN);
+        mpc_tanh (x, x, MPC_RNDNN);
+        assert (mpfr_nan_p (mpc_realref (x)) && mpfr_nan_p (mpc_imagref (x)));
+        mpc_clear (x);
+        return 0;
+      }
+    EOS
+    system ENV.cc, "test.c", "-L#{lib}", "-L#{Formula["mpfr"].opt_lib}",
+                   "-L#{Formula["gmp"].opt_lib}", "-lmpc", "-lmpfr",
+                   "-lgmp", "-o", "test"
+    system "./test"
+  end
+end

macOS/brewfiles/mpfr.rb

+class Mpfr < Formula
+  desc "C library for multiple-precision floating-point computations"
+  homepage "https://www.mpfr.org/"
+  url "https://ftp.gnu.org/gnu/mpfr/mpfr-4.0.2.tar.xz"
+  mirror "https://ftpmirror.gnu.org/mpfr/mpfr-4.0.2.tar.xz"
+  sha256 "1d3be708604eae0e42d578ba93b390c2a145f17743a744d8f3f8c2ad5855a38a"
+
+  bottle do
+    root_url "https://homebrew.bintray.com/bottles"
+    cellar :any
+    sha256 "140d29bfee0c8cf356fbb5391465f781df559e6076988de3ea8bcfd812f3c5bd" => :catalina
+    sha256 "cfce7ab866e98360c9364cd924da620ae7936d3a224d686aacc209c2107d19aa" => :mojave
+    sha256 "bf5d21e7e8e549f7e8d07791a90f44a487f4c7151897b7c64d02928b5bd73520" => :high_sierra
+    sha256 "4fb1860a481e24c70eefc8e5782030612840f1bb8f50586ca76a4c6c53629deb" => :sierra
+  end
+
+  depends_on "gmp"
+
+  def install
+    # Work around macOS Catalina / Xcode 11 code generation bug
+    # (test failure t-toom53, due to wrong code in mpn/toom53_mul.o)
+    ENV.append_to_cflags "-fno-stack-check"
+
+    system "./configure", "--disable-dependency-tracking", "--prefix=#{prefix}",
+                          "--disable-silent-rules"
+    system "make"
+    system "make", "check"
+    system "make", "install"
+  end
+
+  test do
+    (testpath/"test.c").write <<~EOS
+      #include <mpfr.h>
+      #include <math.h>
+      #include <stdlib.h>
+
+      int main() {
+        mpfr_t x, y;
+        mpfr_inits2 (256, x, y, NULL);
+        mpfr_set_ui (x, 2, MPFR_RNDN);
+        mpfr_root (y, x, 2, MPFR_RNDN);
+        mpfr_pow_si (x, y, 4, MPFR_RNDN);
+        mpfr_add_si (y, x, -4, MPFR_RNDN);
+        mpfr_abs (y, y, MPFR_RNDN);
+        if (fabs(mpfr_get_d (y, MPFR_RNDN)) > 1.e-30) abort();
+        return 0;
+      }
+    EOS
+    system ENV.cc, "test.c", "-L#{lib}", "-L#{Formula["gmp"].opt_lib}",
+                   "-lgmp", "-lmpfr", "-o", "test"
+    system "./test"
+  end
+end

macOS/build.sh

@@ -19,6 +19,8 @@
 
 set -ex
 
+ROOTDIR=$(pwd)/..
+
 # Set the compilers
 CC=gcc-9
 CXX=g++-9
@@ -26,21 +28,35 @@ CXX=g++-9
 # Set the number of threads
 NTHREADS=$(nproc)
 
+# Set dependency directory
+LIB64="$ROOTDIR"/macOS/deps/lib64
+
+
 ##
 ## Find Dynare Version
 ##
-ROOTDIR=$(pwd)/..
+DATE=$(date +%Y-%m-%d-%H%M)
+DATELONG=$(date '+%d %B %Y')
+if [[ -d ../.git/ ]]; then
+    SHA=$(git rev-parse HEAD)
+    SHASHORT=$(git rev-parse --short HEAD)
+fi
+
 if [[ -z $VERSION ]]; then
     VERSION=$(grep '^AC_INIT(' ../configure.ac | sed 's/AC_INIT(\[dynare\], \[\(.*\)\])/\1/')
     if [[ -d ../.git/ ]]; then
-        SHA=$(git rev-parse --short HEAD)
-        VERSION_READ="$VERSION-$SHA"
-        VERSION=$VERSION-$(date +%Y-%m-%d-%H%M)-"$SHA"
+        VERSION="$VERSION"-"$SHASHORT"
     fi
 fi
 
-# Set dependency directory
-LIB64="$ROOTDIR"/macOS/deps/lib64
+# Install location must be truncated for installation of `gcc`
+# If it's too long, the headers of the compiled libraries cannot be modified
+# obliging recompilation on the user's system. Truncate to 5 characters
+# To allow for distribution version to appear
+LOCATION=$(echo "$VERSION" | cut -f1 -d"-" | cut -c 1-5)
+if [[ "$VERSION" == *-unstable* || "$VERSION" == [a-zA-Z]* ]]; then
+    LOCATION="$LOCATION"-"$DATE"
+fi
 
 
 ##
@@ -71,14 +87,18 @@ make -j"$NTHREADS"
 ##
 NAME=dynare-"$VERSION"
 PKGFILES="$ROOTDIR"/macOS/pkg/"$NAME"
-mkdir -p "$PKGFILES"/mex/matlab/maci64-7.9-9.3
-mkdir    "$PKGFILES"/mex/matlab/maci64-9.4-9.7
-mkdir    "$PKGFILES"/mex/octave
-mkdir -p "$PKGFILES"/doc/dynare++
-mkdir    "$PKGFILES"/dynare++
-mkdir    "$PKGFILES"/scripts
-mkdir -p "$PKGFILES"/contrib/ms-sbvar/TZcode
-
+mkdir -p \
+      "$PKGFILES"/mex/matlab/maci64-7.9-9.3 \
+      "$PKGFILES"/mex/matlab/maci64-9.4-9.7 \
+      "$PKGFILES"/mex/octave \
+      "$PKGFILES"/doc/dynare++ \
+      "$PKGFILES"/dynare++ \
+      "$PKGFILES"/scripts \
+      "$PKGFILES"/contrib/ms-sbvar/TZcode
+
+if [[ $VERSION == *-unstable* ]]; then
+    echo "$SHA"                                                    > "$PKGFILES"/sha.txt
+fi
 cp -p  "$ROOTDIR"/NEWS                                               "$PKGFILES"
 cp -p  "$ROOTDIR"/COPYING                                            "$PKGFILES"
 cp -p  "$ROOTDIR"/VERSION                                            "$PKGFILES"
@@ -149,12 +169,32 @@ echo -e "function v = supported_octave_version\nv=\"$(octave --eval "disp(OCTAVE
 ## Make package
 ##
 cd "$ROOTDIR"/macOS/pkg
-pkgbuild --root "$PKGFILES" --identifier com.cepremap.dynare --version "$VERSION" --install-location /Applications/Dynare/"$VERSION" "$NAME".pkg
-sed "s/VERSION_READ/$VERSION_READ/g" "$ROOTDIR"/macOS/distribution_template.xml > distribution_tmp.xml
+
+# Dynare option
+pkgbuild --root "$PKGFILES" --identifier com.cepremap.dynare --version "$VERSION" --install-location /Applications/Dynare/"$LOCATION" "$NAME".pkg
+
+# GCC option
+# Create dummy payload for GCC package; otherwise the size is displayed as 0 bytes in the installer
+dd if=/dev/zero of="$ROOTDIR"/macOS/brewfiles/dummy  bs=1m  count=800
+pkgbuild --root "$ROOTDIR"/macOS/brewfiles --identifier com.cepremap.dynare.gcc --version "$VERSION" --scripts "$ROOTDIR"/macOS/scripts --install-location /Applications/Dynare/"$LOCATION" "$NAME"-gcc.pkg
+
+# Replace variables in displayed files
+sed "s/VERSION_READ/$VERSION/g" "$ROOTDIR"/macOS/distribution_template.xml > distribution_tmp.xml
 sed "s/VERSION_NO_SPACE/$VERSION/g" distribution_tmp.xml > distribution.xml
-ln -s "$ROOTDIR"/COPYING "$ROOTDIR"/macOS/
+sed "s/GCC_BINARY/$CC/g" "$ROOTDIR"/macOS/welcome_template.html > "$ROOTDIR"/macOS/welcome.html
+sed "s/VERSION_NO_SPACE/$VERSION/g" "$ROOTDIR"/macOS/welcome.html > "$ROOTDIR"/macOS/welcome_tmp.html
+sed "s/DATE/$DATELONG/g" "$ROOTDIR"/macOS/welcome_tmp.html > "$ROOTDIR"/macOS/welcome.html
+
+# Create installer
 productbuild --distribution distribution.xml --resources "$ROOTDIR"/macOS --package-path ./"$NAME".pkg "$NAME"-new.pkg
+
+# cleanup
 rm -f ./*.xml
 rm -rf "$PKGFILES"
-rm "$ROOTDIR"/macOS/COPYING
+rm -f "$NAME"-gcc.pkg
+rm -f "$ROOTDIR"/macOS/brewfiles/dummy
+rm -f "$ROOTDIR"/macOS/welcome.html
+rm -f "$ROOTDIR"/macOS/welcome_tmp.html
+
+# Final pkg
 mv "$NAME"-new.pkg "$NAME".pkg

macOS/distribution_template.xml

 <?xml version="1.0" encoding="utf-8"?>
 <installer-gui-script minSpecVersion="1">
-    <pkg-ref id="com.cepremap.dynare"/>
-    <options customize="never" require-scripts="false"/>
-    <choices-outline>
-        <line choice="default">
-            <line choice="com.cepremap.dynare"/>
-        </line>
-    </choices-outline>
-    <choice id="default"/>
-    <choice id="com.cepremap.dynare" visible="false">
-        <pkg-ref id="com.cepremap.dynare"/>
-    </choice>
-    <pkg-ref id="com.cepremap.dynare" version="VERSION_NO_SPACE" onConclusion="none">dynare-VERSION_NO_SPACE.pkg</pkg-ref>
-    <title>Dynare VERSION_READ</title>
-    <background file="background.png" scaling="tofit" mime-type="image/png" alignment="topleft" />
-    <background-darkAqua file="background.png" scaling="tofit" mime-type="image/png" alignment="topleft" />
-    <license file="COPYING" mime-type="text/plain" />
+  <title>Dynare VERSION_READ</title>
+  <background file="background.png" scaling="tofit" mime-type="image/png" alignment="topleft" />
+  <background-darkAqua file="background.png" scaling="tofit" mime-type="image/png" alignment="topleft" />
+  <welcome file="welcome.html" mime-type="text/html" />
+  <license file="gpl-3.0-standalone.html" mime-type="text/html" />
+  <pkg-ref id="com.cepremap.dynare" />
+  <options customize="allow" require-scripts="false" hostArchitectures="x86_64" />
+  <choices-outline>
+    <line choice="com.cepremap.dynare" />
+    <line choice="com.cepremap.dynare.gcc" />
+  </choices-outline>
+  <choice id="com.cepremap.dynare" title="Dynare" description="Dynare Required Files" start_enabled="false" enabled="false">
+    <pkg-ref id="com.cepremap.dynare" />
+  </choice>
+  <choice id="com.cepremap.dynare.gcc" title="GCC compiler for use_dll" description="This is necessary for the use of Dynare with the `use_dll` option. NB: This takes a few minutes and requires an active internet connection">
+    <pkg-ref id="com.cepremap.dynare.gcc" />
+  </choice>
+  <pkg-ref id="com.cepremap.dynare" version="VERSION_NO_SPACE">dynare-VERSION_NO_SPACE.pkg</pkg-ref>
+  <pkg-ref id="com.cepremap.dynare.gcc" version="VERSION_NO_SPACE">dynare-VERSION_NO_SPACE-gcc.pkg</pkg-ref>
 </installer-gui-script>

macOS/scripts/postinstall

+#!/usr/bin/env bash
+
+# Copyright © 2019 Dynare Team
+#
+# This file is part of Dynare.
+#
+# Dynare is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# Dynare is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with Dynare.  If not, see <http://www.gnu.org/licenses/>.
+
+set -ex
+
+set -o errexit
+readonly LOG_FILE="$2"/install.log
+sudo touch "$LOG_FILE"
+exec 1>"$LOG_FILE"
+exec 2>&1
+
+# Remove dummy payload
+rm -f "$2"/dummy
+
+# Test for Internet connection
+[[ -z $(curl -s -m 4 www.google.com) ]] && { echo "No internet connection found"; exit 1; }
+
+# Install Command Line Tools
+if [[ -z $(/usr/bin/xcode-select -print-path) ]]; then
+    touch /tmp/.com.apple.dt.CommandLineTools.installondemand.in-progress;
+    SUC=$(softwareupdate -l |
+              grep "\*.*Command Line" |
+              grep -m1 "" |
+              awk -F"*" '{print $2}' |
+              sed -e 's/^ *//' |
+              tr -d '\n')
+    # On macOS 10.15 softwareupdate output is preceded by "Label: "
+    [[ $SUC == Label:* ]] && SUC=${SUC#"Label: "}
+    softwareupdate -i "$SUC" --verbose;
+    rm -f /tmp/.com.apple.dt.CommandLineTools.installondemand.in-progress;
+    softwareupdate -l
+fi
+
+# If CLT installation didn't work, exit
+[[ -z $(/usr/bin/xcode-select -print-path) ]] && \
+    { echo "You must install Command Line Tools to proceed with installation of GCC"; exit 1; }
+
+# Install Homebrew
+BREWDIR="$2"/.brew
+[ -d "$BREWDIR" ] || mkdir -p "$BREWDIR"
+
+BREW_URL="https://github.com/Homebrew/brew"
+BREW_BRANCH="master"
+
+curl -\# -L "$BREW_URL"/tarball/"$BREW_BRANCH" | tar xz -m --strip 1 -C "$BREWDIR"
+
+# Change ownership of Dynare directory
+chown -R "$USER":staff "$2"
+
+sudo -u "$USER" "$BREWDIR"/bin/brew tap homebrew/core
+HOMEBREW_CACHE="$HOME"/Library/Caches/Homebrew-Dynare
+HOMEBREW_NO_AUTO_UPDATE=1
+[[ -z "${HOMEBREW_NO_ANALYTICS}" ]] && HOMEBREW_NO_ANALYTICS=1
+
+# Move modified formulas to Homebrew Formula directory
+mv "$2"/*.rb "$BREWDIR"/Library/Taps/homebrew/homebrew-core/Formula
+
+# Install GCC & deps
+sudo -u "$USER" "$BREWDIR"/bin/brew install gcc -v --force-bottle
+
+exit 0

macOS/welcome_template.html

+<html lang="en">
+  <body>
+    <h3 style="text-align: center;">Welcome to Dynare</h3>
+    <p style="text-align: center;">Version VERSION_NO_SPACE</p>
+    <p style="text-align: center;">DATE</p>
+
+    <p><b>Just a few things to note</b>. This installation can be customized as you can choose not to install the GNU C Compiler (GCC). Installing GCC is necessary if you want to use the <tt>use_dll</tt> option in Dynare, but otherwise unnecessary.</p>
+
+    <p>To install GCC we run a script that first installs the XCode Command Line Tools (an Apple product). The script then installs Homebrew, a package manager for macOS and, finally, GCC itself. Both Homebrew and GCC will be installed in your Dynare installation folder. So, when you delete this folder, they too will be deleted.</p>
+
+    <p>Installing GCC will require an active internet connection and will take a few minutes to a half an hour during the <i>Running package scripts</i> phase of Installation. The time it takes depends on your internet speed, the speed of your computer, and whether or not you already have XCode Command Line Tools installed. The progress bar will not advance during this phase. Please be patient.</p>
+
+    <p> You can choose not to install GCC by choosing <i>Customize</i> from the <i>Installation Type</i> screen and deselecting <i>GCC compiler</i>. If you already have <tt>GCC_BINARY</tt> installed under <tt>/usr/local</tt>, you can forgo the installation of GCC here as Dynare will find your system compiler when you use <tt>use_dll</tt>.</p>
+  </body>
+</html>

preprocessor @ 3ec01b86

-Subproject commit c6beb6c5c6360468b58b3b6e8d295dc22c8bde8b
+Subproject commit 3ec01b861215f3f001310ba029a474c19f4af386