When I execute the ./app install command, I got a error

[GuofaPython]

Directory already configured.

Just run your build command (e.g. ninja) and Meson will regenerate as necessary.
If ninja fails, run "ninja reconfigure" or "meson --reconfigure"
to force Meson to regenerate.

If build failures persist, run "meson setup --wipe" to rebuild from scratch
using the same options as passed when configuring the build.
To change option values, run "meson configure" instead.
[2/3] Compiling C object 'com.github.phase1geo.minder@exe/meson-generated_src_Node.c.o'.
FAILED: com.github.phase1geo.minder@exe/meson-generated_src_Node.c.o
cc -Icom.github.phase1geo.minder@exe -I. -I.. -I/usr/include/glib-2.0 -I/usr/lib/x86_64-linux-gnu/glib-2.0/include -I/usr/include/cairo -I/usr/include/pixman-1 -I/usr/include/uuid -I/usr/include/freetype2 -I/usr/include/libpng16 -I/usr/include/gee-0.8 -I/usr/include/granite -I/usr/include/at-spi2-atk/2.0 -I/usr/include/at-spi-2.0 -I/usr/include/dbus-1.0 -I/usr/lib/x86_64-linux-gnu/dbus-1.0/include -I/usr/include/gtk-3.0 -I/usr/include/gio-unix-2.0 -I/usr/include/pango-1.0 -I/usr/include/fribidi -I/usr/include/harfbuzz -I/usr/include/atk-1.0 -I/usr/include/gdk-pixbuf-2.0 -I/usr/include/libmount -I/usr/include/blkid -I/usr/include/libxml2 -I/usr/include/gtksourceview-4 -I/usr/include/libhandy-1 -I/usr/include/json-glib-1.0 -fdiagnostics-color=always -pipe -D_FILE_OFFSET_BITS=64 -w -g '-DGETTEXT_PACKAGE="com.github.phase1geo.minder"' -pthread -include config.h -MD -MQ 'com.github.phase1geo.minder@exe/meson-generated_src_Node.c.o' -MF 'com.github.phase1geo.minder@exe/meson-generated_src_Node.c.o.d' -o 'com.github.phase1geo.minder@exe/meson-generated_src_Node.c.o' -c 'com.github.phase1geo.minder@exe/src/Node.c'
../src/Node.vala: In function ‘node_instance_init’:
../src/Node.vala:151:11: error: expected expression before ‘{’ token
151 | private RGBA? _link_color = {1.0, 1.0, 1.0, 1.0};
| ^
ninja: build stopped: subcommand failed.
Unable to build project, please review log

[phase1geo]

There shouldn't be a compile issue here. What version of valac is installed on your system?

[GuofaPython]

There shouldn't be a compile issue here. What version of valac is installed on your system?

My package version is：0.48.6-0ubuntu1

[phase1geo]

Yes, there should definitely not be an issue compiling with that version of valac. I'm not sure what the problem is for you. Out of curiosity, can you try ./app clean followed by ./app install?

[GuofaPython]

Yes, there should definitely not be an issue compiling with that version of valac. I'm not sure what the problem is for you. Out of curiosity, can you try ./app clean followed by ./app install?

According to your suggestions I have executed to complete this command but the result is to get the same error. Before executing your suggestion I tried to modify the code, changed _link_color = {1.0, 1.0, 1.0, 1.0} to _link_color = null, and executed ./app install command, successfully built Minder, but I could not open it successfully, when I executed command ./app run, or used the mouse click in the launcher, it only appeared on the screen for a moment and then automatically closed.

[phase1geo]

I would not assign this to null. If you want to try a code change, you could try moving this default assignment to all of the constructors of the Node class and then just leave _link_color assigned to nothing on the failing line.

[phase1geo]

But, this code should not need to be modified. I constantly compile Minder without issue -- I've compiled it with various versions of 0.48.x and newer without issues with this syntax.

[GuofaPython]

I would not assign this to null. If you want to try a code change, you could try moving this default assignment to all of the constructors of the Node class and then just leave _link_color assigned to nothing on the failing line.

emm, modifying a lot of code is still too difficult for me...

[GuofaPython]

But, this code should not need to be modified. I constantly compile Minder without issue -- I've compiled it with various versions of 0.48.x and newer without issues with this syntax.

Okay I'll continue to try to build mider on my utbuntu20.4 system, and I really hope it succeeds, as the version of the app installed sudo apt install minder command is too low and some of it complicates my job.

[ookiineko]

Hi, I got the same issue here, and I am able to solve it by upgrading my Vala compiler to the version in Ubuntu Jammy, and it runs well.

It is definitely easy to upgrade valac, just downloading the depended packages from Launchpad and install them with Gdebi manually.

I also installed some other outdated/missing runtime/build dependencies from Ubuntu Hirsute/Impish/Jammy for building it xDD

[ookiineko]

After Ubuntu Focal, it seems they renamed the libgdk-pixbuf2.0-0 package to libgdk-pixbuf-2.0-0, which would prevent the above mentioned dependencies from being installed, which I fixed by creating a dummy package using equivs.

Here is the control file I used.

[prishs]

I got the exact same error as @GuofaPython.. can any one explain what I need to do to make this code running?? I am running in on Ubuntu 20.04..