On 29/12/2025 17:42, Roger Leigh via Cygwin wrote:
Hi,
I’m trying to test libtiff on Cygwin, and I’m running into a failure. It’s
finding and linking on all platforms with the exception of Cygwin (including
MinGW64 and MSVC). For example:
https://gitlab.com/libtiff/libtiff/-/pipelines/2236584193
-- Found ZLIB: /usr/lib/libz.dll.a (found version "1.3.1")
-- Found Deflate: /usr/lib/libdeflate.dll.a (found version "1.25")
CMake Error at /usr/lib/cmake/libjpeg-turbo/libjpeg-turboTargets.cmake:99
(message):
The imported target "libjpeg-turbo::jpeg" references the file
"/usr/lib/libjpeg.dll.a"
but this file does not exist. Possible reasons include:
* The file was deleted, renamed, or moved to another location.
* An install or uninstall procedure did not complete successfully.
* The installation package was faulty and contained
"/usr/lib/cmake/libjpeg-turbo/libjpeg-turboTargets.cmake"
but not all the files it references.
Call Stack (most recent call first):
/usr/lib/cmake/libjpeg-turbo/libjpeg-turboConfig.cmake:37 (include)
cmake/JPEGCodec.cmake:36 (find_package)
It is entirely correct. The file that’s mentioned in the installed CMake
config file does not exist.
$ find lib -name '*jpeg*'
lib/cmake/libjpeg-turbo
lib/cmake/libjpeg-turbo/libjpeg-turboConfig.cmake
lib/cmake/libjpeg-turbo/libjpeg-turboConfigVersion.cmake
lib/cmake/libjpeg-turbo/libjpeg-turboTargets-relwithdebinfo.cmake
lib/cmake/libjpeg-turbo/libjpeg-turboTargets.cmake
lib/gdk-pixbuf-2.0/2.10.0/loaders/cygpixbufloader-jpeg.dll
lib/libopenjpeg.dll.a
lib/libturbojpeg.dll.a
lib/openjpeg-1.5
lib/pkgconfig/libopenjpeg.pc
lib/pkgconfig/libopenjpeg1.pc
lib/pkgconfig/libturbojpeg.pc
$ find bin -name '*jpeg*'
bin/cygjpeg-8.dll
bin/cygopenjpeg-1.dll
bin/cygturbojpeg-0.dll
So the DLL exists, but the import library does not. Everything else is present
and correct as far as I can tell, but something is not right here. The import
library is missing.
$ grep '\.a' lib/cmake/libjpeg-turbo/*
lib/cmake/libjpeg-turbo/libjpeg-turboTargets-relwithdebinfo.cmake:
IMPORTED_IMPLIB_RELWITHDEBINFO "${_IMPORT_PREFIX}/lib/libjpeg.dll.a"
lib/cmake/libjpeg-turbo/libjpeg-turboTargets-relwithdebinfo.cmake:list(APPEND
_cmake_import_check_files_for_libjpeg-turbo::jpeg "${_IMPORT_PREFIX}/lib/libjpeg.dll.a"
"${_IMPORT_PREFIX}/bin/cygjpeg-8.dll" )
lib/cmake/libjpeg-turbo/libjpeg-turboTargets-relwithdebinfo.cmake:
IMPORTED_IMPLIB_RELWITHDEBINFO "${_IMPORT_PREFIX}/lib/libturbojpeg.dll.a"
lib/cmake/libjpeg-turbo/libjpeg-turboTargets-relwithdebinfo.cmake:list(APPEND
_cmake_import_check_files_for_libjpeg-turbo::turbojpeg
"${_IMPORT_PREFIX}/lib/libturbojpeg.dll.a"
"${_IMPORT_PREFIX}/bin/cygturbojpeg-0.dll" )
Because it’s referenced in the configuration, and has the DLL, and everything
but this file is installed, this looks like a packaging error hence reporting
it here as a bug.
install libjpeg-devel
https://cygwin.com/cgi-bin2/package-cat.cgi?file=x86_64%2Flibjpeg-devel%2Flibjpeg-devel-3.1.3-1&grep=libjpeg.dll.a
Kind regards,
Roger
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