CMake build error with first build when bundling in an external library

[rossant]

I'm on Ubuntu 24.04, I try to bundle msd-atlas-gen into my C/C++ library using cmake (and ninja for the multicore build process).

I'm probably doing something wrong as the first build fails with:

error: ‘buildShapeFromSvgPath’ was not declared in this scope
   82 |     buildShapeFromSvgPath(shape, svg_path);

but all subsequent (re)builds succeed, without doing any change in the code.

The code is:

#include "msdfgen-ext.h"
#include "msdfgen.h"
...
Shape shape;
buildShapeFromSvgPath(shape, svg_path);

This is part of my cmake

set(HAS_MSDF 1)

set(MSDFGEN_CORE_ONLY OFF)
set(MSDFGEN_BUILD_STANDALONE OFF)
set(MSDFGEN_USE_SKIA OFF)
set(MSDFGEN_DISABLE_SVG OFF)

set(MSDF_ATLAS_BUILD_STANDALONE OFF)
set(MSDF_ATLAS_USE_VCPKG OFF)
set(MSDF_ATLAS_USE_SKIA OFF)
set(MSDF_ATLAS_DYNAMIC_RUNTIME ON)
set(MSDF_ATLAS_MSDFGEN_EXTERNAL OFF)

set(BUILD_SHARED_LIBS ON)

# Freetype is required for msdf-atlas-gen
find_package(Freetype REQUIRED)

# tinyxml2
FetchContent_Declare(
    tinyxml2
    GIT_REPOSITORY https://github.com/leethomason/tinyxml2.git
    GIT_TAG 10.0.0
)
FetchContent_MakeAvailable(tinyxml2)

# MSDF atlas
FetchContent_Declare(
    msdfgen-atlas
    GIT_REPOSITORY https://github.com/Chlumsky/msdf-atlas-gen.git
    GIT_TAG master
)
FetchContent_MakeAvailable(msdfgen-atlas)

set(INCL_DIRS ${INCL_DIRS} ${msdfgen-atlas_SOURCE_DIR}/msdfgen ${FREETYPE_INCLUDE_DIR_ft2build})
set(LINK_LIBS ${LINK_LIBS} msdfgen::msdfgen-ext msdf-atlas-gen::msdf-atlas-gen ${FREETYPE_LIBRARIES})

Does anything stand out as obviously wrong above? Thanks! (and thanks for this great library ❤️ )

[Chlumsky]

The only thing I can tell you from looking at the 4 lines of code you posted is that buildShapeFromSvgPath only exists in the msdfgen namespace.

[rossant]

Yes I had tried msdfgen::buildShapeFromSvgPath and the same error occurs. Anyone else had the problem where a cmake build fails the first time but not subsequent times?