linking issues on Rpi4

[japeart]

I downloaded the libimgui-dev package via apt, and have linked into my gcc makefile using:

-L/usr/lib/arm-linux-gnueabihf -limgui

However, it is complaining about undefined references despite the fact I can see the functions when I run nm on the library file. Any suggestions?

[ocornut]

Any suggestions?

Maybe start by listing the undefined references :)

[japeart]

Sure :)

/usr/bin/ld: /usr/lib/arm-linux-gnueabihf/libimgui.a(imgui_draw.o): in function ImFontAtlasBuildPackCustomRects(ImFontAtlas*, void*)': (.text+0x7d6c): undefined reference to stbrp_pack_rects'
/usr/bin/ld: /usr/lib/arm-linux-gnueabihf/libimgui.a(imgui_draw.o): in function ImFontAtlasBuildWithStbTruetype(ImFontAtlas*)': (.text+0xac9c): undefined reference to stbtt_GetFontOffsetForIndex'
/usr/bin/ld: (.text+0xacb0): undefined reference to stbtt_InitFont' /usr/bin/ld: (.text+0xaee4): undefined reference to stbtt_FindGlyphIndex'
/usr/bin/ld: (.text+0xb284): undefined reference to stbtt_ScaleForPixelHeight' /usr/bin/ld: (.text+0xb2b4): undefined reference to stbtt_FindGlyphIndex'
/usr/bin/ld: (.text+0xb2fc): undefined reference to stbtt_GetGlyphBitmapBoxSubpixel' /usr/bin/ld: (.text+0xb3e4): undefined reference to stbtt_PackBegin'
/usr/bin/ld: (.text+0xb434): undefined reference to stbrp_pack_rects' /usr/bin/ld: (.text+0xb590): undefined reference to stbtt_ScaleForMappingEmToPixels'
/usr/bin/ld: (.text+0xb6c0): undefined reference to stbtt_PackFontRangesRenderIntoRects' /usr/bin/ld: (.text+0xb6f8): undefined reference to stbtt_PackEnd'
/usr/bin/ld: (.text+0xb780): undefined reference to stbtt_ScaleForPixelHeight' /usr/bin/ld: (.text+0xb798): undefined reference to stbtt_GetFontVMetrics'
/usr/bin/ld: (.text+0xb87c): undefined reference to `stbtt_GetPackedQuad'
collect2: error: ld returned 1 exit status

[PathogenDavid]

The Debian distribution of Dear ImGui is configured to use the version of stb provided by libstb-dev.

If you use pkg-config instead of manually passing -limgui it should automatically pull it in. You can also probably just add -lstb.

It's also worth pointing out that the release of Dear ImGui provided by Debian is quite old, v1.81 came out in February 2021. You're probably better off consuming it the normal way.