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2025-03-22Improve DLL search strategy for load-foreign-libraryMichael Gran1-15/+136
The new non-libltdl foreign library loading algorithm from 3.0.6 fails to cover common cases regarding how libtool names and installs DLL files. Notably, it fails to recognize when libtool has added the major version number into the filename itself, such as libfoo-1.dll Also, it does not search in binary directories and the PATH for DLL files, where libtool is likely to install DLLs. This adds the option to search for dlls with major version numbers in the filename, and modifies the search strategy for DLL-using OSs to check bindir and PATH. For MSYS, libraries are installed with the 'msys-' prefix. So this modifies load-foreign-library to handle that prefix as well. It changes the #:rename-on-cygwin? option to #:host-type-rename? to better reflect that is works on both Cygwin and MSYS. Partially based on a patch by Hannes Müller. * NEWS: updated * doc/ref/api-foreign.texi: document updates to load-foreign-library and system-dll-path * module/system/foreign-library.scm (is-integer-string?): new utility function (dll-name-match?): new utility function (find-best-dll-from-matches): new utility function (dll-exists-with-version): new function that implements new dll search logic (file-exists-with-extension): add flag argument to allow new dll search (file-exists-in-path-with-extension): add flag argument to all new dll search (system-dll-path): new parameter (lib->msys): new helper function (load-foreign-library): add new optarg flag #:allow-dll-version-suffix? Pass new flag to library search functions. Implement new search strategy for #:search-system-paths? on DLL systems' replace #:rename-on-cygwin? with #:host-type-rename? Use that option to rename both MSYS and Cygwin libraries. (guile-system-extensions-path): prefer bindir to libdir on DLL systems * test-suite/tests/foreign.test ("dll-name-match?"): new test category ("find-best-dll-from-matches"): new test category ("lib->msys"): new unit tests
2021-09-02foreign-library: fix darwin detectionAleix Conchillo Flaqué1-1/+1
* module/system/foreign-library.scm (system-library-extensions): fix darwin host detection. darwin host types have "-darwin" but not "-darwin-".
2021-03-13On Cygwin, 'lib' DLLs use 'cyg' prefixMike Gran1-1/+23
When using automake and libtool to build DLLs on Cygwin, libtool will rename libXXX to cygXXX. 'load-foreign-library' should emulate libltdl behavior and search for DLLs using that convention. * module/system/foreign-library.scm (lib->cyg): new helper function (load-foreign-library): add rename-on-cygwin? option to rename libraries using Cygwin semantics * test-suite/tests/foreign.test: new test section 'lib->cyg' * doc/ref/api-foreign.text: document new rename-on-cygwin? option for load-foreign-library
2021-02-03Replace libltdl with raw dlopen, dlsymAndy Wingo1-0/+231
* NEWS: Update. * am/bootstrap.am (SOURCES): * module/Makefile.am (SOURCES): Add system/foreign-library.scm. * configure.ac: Replace ltdl check with -ldl check. * libguile/dynl.c: Rewrite to just expose core dlopen / dlsym / etc to a helper Scheme module. (scm_dynamic_link, scm_dynamic_pointer, scm_dynamic_function) (scm_dynamic_object_p, scm_dynamic_call): Rewrite in terms of (system foreign-library). * libguile/extensions.c (load_extension): Avoid scm_dynamic_call. * module/system/foreign-library.scm: New file. * module/oop/goops.scm (<dynamic-object>): Hackily export <foreign-library> instead of a class here. * doc/ref/api-foreign.texi (Foreign Function Interface): Rewrite to only document the new interfaces. Eventually we will deprecate dynamic-link and friends. * doc/ref/guile.texi (API Reference): Move Foreign Objects after Foreign Function Interface. Seems there should be some closer relationship but this will do for now. * doc/ref/tour.texi (Putting Extensions into Modules): * doc/ref/libguile-parallel.texi (Parallel Installations): Update for rename of Modules and Extensions to Foreign Extensions. * libguile/deprecated.h: * libguile/deprecated.c (scm_dynamic_unlink): Deprecate. * libguile/guile.c: Remove ltdl include. * test-suite/tests/foreign.test: Update tests to use new API, and update error expectations.