Hi,

but this makes no difference, c++17 is still used. How to convince cmake_src_compile to use -std=c++14?

Cmake sets those flags during src_configure (when the build dir is configured) and therefore ignores CXXFLAGS entirely during src_compile.

You should set those in src_configure before cmake_src_configure gets called. And Arsen Arsenovićs reply applies here on how to use flag-o-matic function append-cxxflags to do it.

--
Alfred Wingate

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

Hi,

Andrey Grozin <grozin@woodpecker.gentoo.org> writes:

Hello *,

I'm trying to package a new version of sci-visualization/gle which now uses cmake. After some patching CMakeLists.txt, it configures successfully. But at build time it spits zillion errors

error: ISO C++17 does not allow dynamic exception specifications

The natural thing to try is to add -std=c++14 to CXXFLAGS. So I tried

src_compile() {
CXXFLAGS="${CXXFLAGS} -std=c++14" cmake_src_compile
}

but this makes no difference, c++17 is still used. How to convince cmake_src_compile to use -std=c++14?

Thanks in advance,
Andrey

audacity-2.4.2-r3.ebuild has something for this already:
``append-cxxflags -std=gnu++14''

Check out flag-o-matic.eclass. Note that the build system could still
be overriding it, so if that fails, I'd check the compilation commands
for -std=... parameters, as well as CXX_STANDARD_LEVEL, or whatever
cmake calls it.

Hope that helps, have a great day.
--
Arsen Arsenović

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Hello.

You need to add

set(CMAKE_CXX_STANDARD 14)
set(CMAKE_CXX_STANDARD_REQUIRED ON)

into CMakeLists.txt after project() declaration via patching. Since
this is an upstream issue, you need to notify upstream about C++17 incompatibility.

сб, 17 дек. 2022 г. в 14:35, Andrey Grozin <grozin@woodpecker.gentoo.org>:

Hello *,

I'm trying to package a new version of sci-visualization/gle which now
uses cmake. After some patching CMakeLists.txt, it configures
successfully. But at build time it spits zillion errors

error: ISO C++17 does not allow dynamic exception specifications

The natural thing to try is to add -std=c++14 to CXXFLAGS. So I tried

src_compile() {
CXXFLAGS="${CXXFLAGS} -std=c++14" cmake_src_compile
}

but this makes no difference, c++17 is still used. How to convince cmake_src_compile to use -std=c++14?

Thanks in advance,
Andrey

--
From Siberia with Love!

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

Also, according to commit history, dynamic exception usage was removed
in https://github.com/vlabella/GLE/commit/14753e9aba9eb6490358caaeb60f6e36ba314acc,
so you can try to apply this patch.

сб, 17 дек. 2022 г. в 16:05, Azamat Hackimov <azamat.hackimov@gmail.com>:

Hello.

You need to add

set(CMAKE_CXX_STANDARD 14)
set(CMAKE_CXX_STANDARD_REQUIRED ON)

into CMakeLists.txt after project() declaration via patching. Since
this is an upstream issue, you need to notify upstream about C++17 incompatibility.

сб, 17 дек. 2022 г. в 14:35, Andrey Grozin <grozin@woodpecker.gentoo.org>:

Hello *,

I'm trying to package a new version of sci-visualization/gle which now
uses cmake. After some patching CMakeLists.txt, it configures
successfully. But at build time it spits zillion errors

error: ISO C++17 does not allow dynamic exception specifications

The natural thing to try is to add -std=c++14 to CXXFLAGS. So I tried

src_compile() {
CXXFLAGS="${CXXFLAGS} -std=c++14" cmake_src_compile
}

but this makes no difference, c++17 is still used. How to convince cmake_src_compile to use -std=c++14?

Thanks in advance,
Andrey

--
From Siberia with Love!

--
From Siberia with Love!

--- SoupGate-Win32 v1.05
* Origin: fsxNet Usenet Gateway (21:1/5)

This message is in MIME format. The first part should be readable text,
while the remaining parts are likely unreadable without MIME-aware tools.

On Sat, 17 Dec 2022, Arsen Arsenović wrote:

audacity-2.4.2-r3.ebuild has something for this already:
``append-cxxflags -std=gnu++14''

Thanks, this works.

Andrey

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