Support c++17 by backporting tectonic-typesetting/tectonic#1202

Author: anjos

recipe/bld.bat

@@ -2,7 +2,7 @@
 
 @REM Here we ditch the -GL flag, which messes up our static libraries.
 set "CFLAGS=-MD -DGRAPHITE2_STATIC"
-set "CXXFLAGS=-MD -DGRAPHITE2_STATIC"
+set "CXXFLAGS=-MD -DGRAPHITE2_STATIC -std:c++17"
 set "PKG_CONFIG_PATH=%LIBRARY_PREFIX:\=/%/lib/pkgconfig;%LIBRARY_PREFIX:\=/%/share/pkgconfig"
 
 @REM FIX UP LIBZ-SYS
@@ -14,10 +14,10 @@ cargo-bundle-licenses --format yaml --output THIRDPARTY.yml
 @REM Also need to skip the Unicode filename test due to conda-build issue:
 @REM  https://github.com/conda/conda-build/issues/4043
 set RUST_TEST_THREADS=1
-cargo test --release -- --skip unicode_file_name
+cargo test --release --features external-harfbuzz -- --skip unicode_file_name
 if errorlevel 1 exit 1
 
-cargo install --path . --bin tectonic --root %LIBRARY_PREFIX%
+cargo install --path . --bin tectonic --root %LIBRARY_PREFIX% --features external-harfbuzz
 if errorlevel 1 exit 1
 
 del %LIBRARY_PREFIX%\.crates.toml

recipe/build.sh

@@ -1,4 +1,4 @@
-#! /bin/bash
+#!/usr/bin/env bash
 
 set -ex
 
@@ -7,23 +7,23 @@ export PKG_CONFIG_ALLOW_CROSS=1
 # https://github.com/rust-lang/cargo/issues/10583#issuecomment-1129997984
 export CARGO_NET_GIT_FETCH_WITH_CLI=true
 
-if [ $(uname) = Darwin ] ; then
-    export CXXFLAGS="-arch $OSX_ARCH -stdlib=libc++ -std=c++11"
+if [ $(uname) = Darwin ]; then
+    export CXXFLAGS="-arch $OSX_ARCH -stdlib=libc++ -std=c++17"
     export RUSTFLAGS="-C link-args=-Wl,-rpath,$PREFIX/lib"
 
     if [[ "${CONDA_BUILD_CROSS_COMPILATION}" != "1" ]]; then
-        DYLD_FALLBACK_LIBRARY_PATH=$PREFIX/lib RUSTDOCFLAGS="-C linker=$CC" cargo test --release
+        DYLD_FALLBACK_LIBRARY_PATH=$PREFIX/lib RUSTDOCFLAGS="-C linker=$CC" cargo test --release --features external-harfbuzz
     fi
 else
     export CFLAGS="-std=gnu99 $CFLAGS"
     export RUSTFLAGS="-C link-args=-Wl,-rpath-link,$PREFIX/lib"
 
     if [[ "${CONDA_BUILD_CROSS_COMPILATION}" != "1" ]]; then
-        LD_LIBRARY_PATH=$PREFIX/lib RUSTDOCFLAGS="-C linker=$CC" cargo test --release
+        LD_LIBRARY_PATH=$PREFIX/lib RUSTDOCFLAGS="-C linker=$CC" cargo test --release --features external-harfbuzz
     fi
 fi
 
 cargo-bundle-licenses --format yaml --output THIRDPARTY.yml
-cargo install --locked --no-track --path . --bin tectonic --root $PREFIX
+cargo install --no-track --locked --path . --bin tectonic --root $PREFIX --features external-harfbuzz
 rm -f $PREFIX/.crates.toml
 rm -f $PREFIX/.crates2.json

recipe/meta.yaml

@@ -1,6 +1,6 @@
 {% set name = "tectonic" %}
 {% set version = "0.15.0" %}
-{% set sha256 = "fe58806e4ffc54487f40b91da4cbd46717807937e33e2fc830fcfef7e023ab39" %}
+{% set sha256 = "3c13de312c4fe39ff905ad17e64a15a3a59d33ab65dacb0a8b9482c57e6bc6aa" %}
 {% set posix = 'm2-' if win else '' %}
 {% set native = 'm2w64-' if win else '' %}
 
@@ -10,9 +10,10 @@ package:
 
 source:
   fn: {{ name }}-{{ version }}.tar.gz
-  url: https://crates.io/api/v1/crates/{{ name }}/{{ version }}/download
+  url: https://github.com/tectonic-typesetting/{{ name }}/archive/refs/tags/{{ name }}@{{ version }}.tar.gz
   sha256: {{ sha256 }}
   patches:
+    - pr-1202-fix-use-cxx-17.patch
     - winzip.patch  # [win]
 
 build:
@@ -31,6 +32,7 @@ requirements:
     - harfbuzz   # [build_platform != target_platform]
 
   host:
+    - expat  # [not osx]
     - fontconfig  # [not osx]
     - freetype
     - glib  # development files needed by harfbuzz
@@ -72,3 +74,4 @@ about:
 extra:
   recipe-maintainers:
     - pkgw
+    - anjos