LibreDWG build on Ubuntu 20

[AndreiCherniaev]

I try to build LibreDWG for my Ubuntu 20 x86_64 using instruction:
git clone https://git.savannah.gnu.org/git/libredwg.git
cd libredwg
mkdir build
cd build
cmake ..
make
make install (or use checkinstall, or simply locate & copy the dwg2dxf utility to your executables path, it will be then autodetected by FreeCAD)

But there is error during building:
[ 25%] Building C object CMakeFiles/redwg.dir/src/in_json.c.o
/home/a/snap/freecad/common/libredwg/src/in_json.c:54:10: fatal error: ../jsmn/jsmn.h: No such file or directory
54 | #include "../jsmn/jsmn.h"
| ^~~~~~~~~~~~~~~~
compilation terminated.

Looks like I forgot install some dependents on my system. But I want to say that it will be perfect if buildsystem checked which dependents are not is user's system now, istn't it?

[rurban]

you missed ./autogen.sh, see the README
you can also check how the Docker or CI builds are doing it.

[AndreiCherniaev]

you missed ./autogen.sh, see the README you can also check how the Docker or CI builds are doing it.

Now I try to build using readme:
In new folder1 I try:
$ sh ./autogen.sh (if you checked out the source code from git)
$ ./configure [--enable-trace] [--disable-write] [--disable-shared]
$ make -j3

Making all in doc
make[2]: Entering directory '/home/a/snap/freecad/common/libredwg/doc'
echo make regen-dynapi might be needed
make regen-dynapi might be needed
Updating ./version.texi
MAKEINFO LibreDWG.info
/home/a/snap/freecad/common/libredwg/build-aux/missing: line 81: makeinfo: command not found
WARNING: 'makeinfo' is missing on your system.
You should only need it if you modified a '.texi' file, or
any other file indirectly affecting the aspect of the manual.
You might want to install the Texinfo package:
https://www.gnu.org/software/texinfo/
The spurious makeinfo call might also be the consequence of
using a buggy 'make' (AIX, DU, IRIX), in which case you might
want to install GNU make:
https://www.gnu.org/software/make/
make[2]: *** [Makefile:465: LibreDWG.info] Error 127
make[2]: Leaving directory '/home/a/snap/freecad/common/libredwg/doc'
make[1]: *** [Makefile:675: all-recursive] Error 1
make[1]: Leaving directory '/home/a/snap/freecad/common/libredwg'
make: *** [Makefile:558: all] Error 2

In new folder2 I try:
$ sh ./autogen.sh (if you checked out the source code from git)
$ ./configure --enable-trace --disable-write --disable-shared
$ make

make[2]: Entering directory '/home/a/snap/freecad/common/libredwg/programs'
CC dwgread.o
CCLD dwgread
/usr/bin/ld: ../src/.libs/libredwg.a(decode_r11.o): in function decode_preR13': /home/a/snap/freecad/common/libredwg/src/decode_r11.c:697: undefined reference to dwg_add_Document'
/usr/bin/ld: ../src/.libs/libredwg.a(decode_r11.o): in function decode_preR13_section': /home/a/snap/freecad/common/libredwg/src/decode_r11.c:325: undefined reference to dwg_add_BLOCK_HEADER'
/usr/bin/ld: /home/a/snap/freecad/common/libredwg/src/decode_r11.c:365: undefined reference to dwg_add_LAYER' /usr/bin/ld: /home/a/snap/freecad/common/libredwg/src/decode_r11.c:377: undefined reference to dwg_add_STYLE'
/usr/bin/ld: /home/a/snap/freecad/common/libredwg/src/decode_r11.c:399: undefined reference to dwg_add_LTYPE' /usr/bin/ld: /home/a/snap/freecad/common/libredwg/src/decode_r11.c:434: undefined reference to dwg_add_VIEW'
collect2: error: ld returned 1 exit status
make[2]: *** [Makefile:717: dwgread] Error 1
make[2]: Leaving directory '/home/a/snap/freecad/common/libredwg/programs'
make[1]: *** [Makefile:675: all-recursive] Error 1
make[1]: Leaving directory '/home/a/snap/freecad/common/libredwg'
make: *** [Makefile:558: all] Error 2

[rurban]

./configure --enable-trace --disable-write --disable-shared
does not work yet.

try ./configure or any configuration from the CI's. e.g. from .github/workflows/main.yml, .cirrus.yml or .appveyor.yml

[AndreiCherniaev]

./configure --enable-trace --disable-write --disable-shared does not work yet.

try ./configure or any configuration from the CI's. e.g. from .github/workflows/main.yml, .cirrus.yml or .appveyor.yml

I use empty folder and try
sh ./autogen.sh (if you checked out the source code from git)
./configure
make -j3
And there is error.

But works after
sudo apt-get install texinfo
I can build now.

[AndreiCherniaev]

After build I try execute
dwg2dxf
dwg2dxf: error while loading shared libraries: libredwg.so.0: cannot open shared object file: No such file or directory

But I do
sudo ldconfig

And now if I call dwg2dxf I get
Usage: dwg2dxf [-v[N]] [--as rNNNN] [-m|--minimal] [-b|--binary] DWGFILES...

But if I use FreeCAD I still got
ODA (formerly Teigha) File Converter not found, DWG support is disabled

log.txt
@rurban

[chinhuat]

But if I use FreeCAD I still got ODA (formerly Teigha) File Converter not found, DWG support is disabled

That's not a libredwg issue, have you configured FreeCAD to use to libredwg? See: https://wiki.freecadweb.org/Import_Export_Preferences#DWG