How to link an external library in Qt Creator when LIBS += -L“…” and -l don't seem to work?

Christian Ehrlicher

@Warrior said in How to link an external library in Qt Creator when LIBS += -L“…” and -l don't seem to work?:

They're both from the same path.

No matter what you tell us - no they're not from the same path. Make sure you use the right one and think about e.g. case sensitivity.

JonB

@Warrior said in How to link an external library in Qt Creator when LIBS += -L“…” and -l don't seem to work?:

They're both from the same path.

Can you show us what the file manager says the path it is showing is?

Warrior

@SGaist @JonB @jsulm @Christian-Ehrlicher Thank you all. I finally managed to fix the issue. I cloned the repo in the same directory where my code is and built it there. Here's what ls -lh /home/Warrior/Desktop/pathtracer/oidn/build shows me now and I can successfully build my code and run it. I cannot believe that things didn't work the first time and symlinks were incorrect/missing:

total 51M
drwxrwxr-x 4 Warrior Warrior 4.0K Feb  9 10:14 apps
-rw-rw-r-- 1 Warrior Warrior  19K Feb  9 10:14 CMakeCache.txt
drwxrwxr-x 7 Warrior Warrior 4.0K Feb  9 10:19 CMakeFiles
-rw-rw-r-- 1 Warrior Warrior 5.6K Feb  9 10:14 cmake_install.cmake
-rw-rw-r-- 1 Warrior Warrior 2.5K Feb  9 10:17 color_ispc_avx2.h
-rw-rw-r-- 1 Warrior Warrior 2.5K Feb  9 10:17 color_ispc_avx512skx.h
-rw-rw-r-- 1 Warrior Warrior 3.1K Feb  9 10:17 color_ispc.h
-rw-rw-r-- 1 Warrior Warrior 2.5K Feb  9 10:17 color_ispc_sse4.h
drwxrwxr-x 3 Warrior Warrior 4.0K Feb  9 10:14 common
-rw-r--r-- 1 Warrior Warrior 3.3K Feb  9 10:14 CPackConfig.cmake
-rw-r--r-- 1 Warrior Warrior 3.7K Feb  9 10:14 CPackSourceConfig.cmake
-rw-rw-r-- 1 Warrior Warrior 2.6K Feb  9 10:17 input_reorder_ispc_avx2.h
-rw-rw-r-- 1 Warrior Warrior 2.6K Feb  9 10:17 input_reorder_ispc_avx512skx.h
-rw-rw-r-- 1 Warrior Warrior 3.1K Feb  9 10:17 input_reorder_ispc.h
-rw-rw-r-- 1 Warrior Warrior 2.6K Feb  9 10:17 input_reorder_ispc_sse4.h
-rw-rw-r-- 1 Warrior Warrior  41K Feb  9 10:14 libcommon.a
-rw-rw-r-- 1 Warrior Warrior  16M Feb  9 10:17 libdnnl.a
lrwxrwxrwx 1 Warrior Warrior   24 Feb  9 10:19 libOpenImageDenoise.so -> libOpenImageDenoise.so.0
lrwxrwxrwx 1 Warrior Warrior   28 Feb  9 10:19 libOpenImageDenoise.so.0 -> libOpenImageDenoise.so.1.3.0
-rwxrwxr-x 1 Warrior Warrior  34M Feb  9 10:19 libOpenImageDenoise.so.1.3.0
-rw-rw-r-- 1 Warrior Warrior  37K Feb  9 10:19 libutils.a
drwxrwxr-x 2 Warrior Warrior 4.0K Feb  9 10:17 local__core
-rw-rw-r-- 1 Warrior Warrior 104K Feb  9 10:14 Makefile
drwxrwxr-x 3 Warrior Warrior 4.0K Feb  9 10:14 mkl-dnn
-rwxrwxr-x 1 Warrior Warrior 181K Feb  9 10:19 oidnBenchmark
-rwxrwxr-x 1 Warrior Warrior  59K Feb  9 10:19 oidnDenoise
-rwxrwxr-x 1 Warrior Warrior 882K Feb  9 10:19 oidnTest
-rw-r--r-- 1 Warrior Warrior 1.6K Feb  9 10:14 OpenImageDenoiseConfigVersion.cmake
-rw-rw-r-- 1 Warrior Warrior 1.5K Feb  9 10:17 output_copy_ispc_avx2.h
-rw-rw-r-- 1 Warrior Warrior 1.5K Feb  9 10:17 output_copy_ispc_avx512skx.h
-rw-rw-r-- 1 Warrior Warrior 1.9K Feb  9 10:17 output_copy_ispc.h
-rw-rw-r-- 1 Warrior Warrior 1.5K Feb  9 10:17 output_copy_ispc_sse4.h
-rw-rw-r-- 1 Warrior Warrior 2.5K Feb  9 10:17 output_reorder_ispc_avx2.h
-rw-rw-r-- 1 Warrior Warrior 2.5K Feb  9 10:17 output_reorder_ispc_avx512skx.h
-rw-rw-r-- 1 Warrior Warrior 3.1K Feb  9 10:17 output_reorder_ispc.h
-rw-rw-r-- 1 Warrior Warrior 2.5K Feb  9 10:17 output_reorder_ispc_sse4.h
-rw-rw-r-- 1 Warrior Warrior 1.5K Feb  9 10:17 upsample_ispc_avx2.h
-rw-rw-r-- 1 Warrior Warrior 1.5K Feb  9 10:17 upsample_ispc_avx512skx.h
-rw-rw-r-- 1 Warrior Warrior 1.8K Feb  9 10:17 upsample_ispc.h
-rw-rw-r-- 1 Warrior Warrior 1.5K Feb  9 10:17 upsample_ispc_sse4.h
drwxrwxr-x 2 Warrior Warrior 4.0K Feb  9 10:17 weights

jsulm

@Warrior Just as a tip: do not build inside source code tree. Create a build folder and build from there (out of source build):

mkdir build
cd build
cmake ../SOURCE_CODE_FOLDER
make
make install

Pablo J. Rogina

@Warrior said in How to link an external library in Qt Creator when LIBS += -L“…” and -l don't seem to work?:

I finally managed to fix the issue

so please don't forget to mark your post as solved!

coffeesmoke

QMAKE_LFLAGS += "-Wl,-rpath,\'/home/Warrior/Desktop/pathtracer/oidn/build\'"