On 24/07/2023 09:26, Remco Viëtor wrote:
On lundi 24 juillet 2023 10:01:59 CEST tony Hamilton wrote:
(...)
Working in this mode of unbounded ignorance is not very satisfying, so I
would be grateful if you can direct me to the source of your
understanding about cmake expecting /usr/bin/c++ to be an alias of
/usr/bin/g++. That way I can understand better the reason for this
common compile failure.
It's not so much that c++ needs to be an alias for g++, but that you have to
tell cmake which version to use if that is different from the "system"
version. On my system (OpenSUSe Leap 15.5), both /usr/bin/c++ and /usr/bin/g++
are symlinks to another file. Both link to version 7.x.
So to get darktable to compile, I have to tell cmake to use a different
version (which of course needs to be installed).
To do that, there is the "export" command to set environment variables CC and
CXX. The build script will use those two variables to decide which command to
use for the C- and C++ compiler (resp.).
For me, the following works (after removing o possible ./build dir):
# export CC=gcc-12; export CXX=g++-12; ./build.sh
That will build the program, but not install it. It tells you the command to
install darktable (but you will have to precede that command with "sudo", as
it needs to write to a system directory /opt
Remco
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This is commendably clear and most appreciated. Is it safe to remove the
./build directory in its entirety?
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