ixion-0.18 @0.18.1: error: no template named 'variant' in namespace 'std'

[graywolf-s1]

Compilation of ixion-0.18 fails when trying to install it (as a dependency for libreoffice).

--->  Fetching archive for ixion-0.18
--->  Attempting to fetch ixion-0.18-0.18.1_1.darwin_23.arm64.tbz2 from https://vie.at.packages.macports.org/ixion-0.18
--->  Attempting to fetch ixion-0.18-0.18.1_1.darwin_23.arm64.tbz2 from https://packages.macports.org/ixion-0.18
--->  Attempting to fetch ixion-0.18-0.18.1_1.darwin_23.arm64.tbz2 from https://fra.de.packages.macports.org/ixion-0.18
--->  Fetching distfiles for ixion-0.18
--->  Verifying checksums for ixion-0.18
--->  Extracting ixion-0.18
--->  Configuring ixion-0.18
--->  Building ixion-0.18                                
Error: Failed to build ixion-0.18: command execution failed
Error: See /opt/local/var/macports/logs/_Users_tomas.volf_src_ports_devel_ixion-0.18/ixion-0.18/main.log for details.
Error: Follow https://guide.macports.org/#project.tickets if you believe there is a bug.

First error from the log file:

:info:build In file included from document.cpp:8:
:info:build ../../include/ixion/document.hpp:47:14: error: no template named 'variant' in namespace 'std'
:info:build         std::variant<std::string_view, ixion::abs_address_t> value;
:info:build         ~~~~~^

[graywolf-s1]

Log file from the build

[ryandesign (Ryan Carsten Schmidt)]

std::variant seems to require C++17. The build seems to be requesting C++11 mode, so naturally this will fail:

:info:build libtool: compile:  /usr/bin/clang++ -std=gnu++11 -std=c++17 -std=gnu++11 -DHAVE_CONFIG_H -I. -I../.. -I../../include -I../../src/include -DIXION_BUILD -I/opt/local/include/mdds-2.1 -I/opt/local/libexec/boost/1.76/include -I/opt/local/libexec/boost/1.76/include -I/opt/local/include -isysroot/Library/Developer/CommandLineTools/SDKs/MacOSX14.sdk -pipe -I/opt/local/libexec/boost/1.76/include -Os -stdlib=libc++ -isysroot/Library/Developer/CommandLineTools/SDKs/MacOSX14.sdk -arch arm64 -fvisibility=hidden -Wall -Wshadow -Wno-write-strings -pthread -DSIZEOF_VOID_P=8 -O2 -DIXION_THREADS=1 -MT cell_access.lo -MD -MP -MF .deps/cell_access.Tpo -c cell_access.cpp  -fno-common -DPIC -o .libs/cell_access.o

Essentially the same problem was reported for ixion-0.17 in #70373.

[graywolf-s1]

What I do not understand is why ​https://github.com/macports/macports-ports/blob/master/devel/ixion-0.18/Portfile#L30 is not sufficient. Based on the log line you posted above it seems to request *both* gnu++11 and c++17. Which is bit weird.

[ryandesign (Ryan Carsten Schmidt)]

Downgrading to autoconf 2.71 works for me. I've filed ​a bug report with the developers of ixion.

[ryandesign (Ryan Carsten Schmidt)]

Upstream offers release tarballs which were built with autoconf 2.71 or earlier, so switching the MacPorts ixion ports to use those would fix the problem, and is desirable for all the other usual reasons as well. However, achieving this is complicated by #71113.

[ryandesign (Ryan Carsten Schmidt)]

In a7480b24bcdb13ece686cbee59fb1aee68d9d322/macports-ports (master):

ixion-0.18: Use release tarball

Closes: #71102