[FFmpeg-cvslog] [ffmpeg] branch master updated. 8eca3fa619 configure: use proper Windows-style static library naming

[ffmpeg-git at ffmpeg.org]

The branch, master has been updated
       via  8eca3fa619a7fb2190a3d4203e01a0d2661e7f91 (commit)
      from  b8d5f65b9e89d893f27cf00799dbc15fc0ca2f8e (commit)


- Log -----------------------------------------------------------------
commit 8eca3fa619a7fb2190a3d4203e01a0d2661e7f91
Author:     Kacper Michajłow <kasper93 at gmail.com>
AuthorDate: Sun Aug 3 20:59:23 2025 +0200
Commit:     James Almer <jamrial at gmail.com>
CommitDate: Wed Aug 13 13:17:53 2025 +0000

    configure: use proper Windows-style static library naming
    
    On Windows, static libraries are typically named with a .lib extension.
    An exception to this is MinGW targets, which are treated as a distinct
    target-os.
    
    Using Windows-style naming allows `clang` to be used as the linker
    driver, instead of invoking link or lld-link directly. The latter
    approach requires manually specifying standard libraries when compiling
    with `clang` rather than `clang-cl`, and manually specifying standard
    libraries may be error-prone or incomplete.
    
    Using Windows-style naming allows Clang to be used as the linker driver,
    instead of invoking link or lld-link directly. The latter approach
    requires manually specifying standard libraries, which may be
    error-prone or incomplete.
    
    This change also improves support for LTO and sanitizer builds, where
    it's significantly easier to let the compiler driver manage the
    necessary linker flags.
    
    It fixes issues where Clang is asked to link `-lavcodec`, which gets
    passed to the linker as avcodec.lib, resulting in an error like:
    lld-link: error: could not open 'avcodec.lib': no such file or directory
    This happens because `libavcodec.a` was unexpectedly generated, not
    `avcodec.lib` expected by tooling.
    
    Additionally, using `clang` (not `clang-cl`) is simplified, as it does
    not use autolinking like MSVC/clang-cl does. Now `--ld=clang` can be
    used to add all the required libraries. Previously, building with
    `clang` was only possible by using `--ld=lld-link` and manually
    specifying system dependencies in `extra-ldflags`.
    
    Note that those changes doesn't affect mingw build. MSVC builds will
    produce .lib static libraries now, but the linking process itself is not
    affected, because filenames are passed directly.
    
    To summarize in Windows non-mingw builds:
    Static builds now produce `lib/avcodec.lib` instead of `lib/libavcodec.a`.
    Shared builds remain unchanged, producing `bin/avcodec.lib` together with
    `bin/avcodec-62.dll`.
    
    This also removes setting LD_LIB from Win32/64 target as there is one
    type of .lib in practice. We cannot build both shared and static at the
    same time as noted by the next line.
    
    Signed-off-by: Kacper Michajłow <kasper93 at gmail.com>

diff --git a/configure b/configure
index 727c3daea8..416cd2d1d6 100755
--- a/configure
+++ b/configure
@@ -5157,7 +5157,7 @@ probe_cc(){
         _cc_o='-Fo$@'
         _cc_e='-P'
         _flags_filter=icl_flags
-        _ld_lib='lib%.a'
+        _ld_lib='%.lib'
         _ld_path='-libpath:'
         # -Qdiag-error to make icl error when seeing certain unknown arguments
         _flags='-nologo -Qdiag-error:4044,10157'
@@ -5175,7 +5175,7 @@ probe_cc(){
         _ident=$($_cc -flavor gnu --version 2>/dev/null)
         _ld_o='-out:$@'
         _flags_filter=msvc_flags
-        _ld_lib='lib%.a'
+        _ld_lib='%.lib'
         _ld_path='-libpath:'
     elif VSLANG=1033 $_cc -nologo- 2>&1 | grep -q ^Microsoft || { $_cc -v 2>&1 | grep -q clang && $_cc -? > /dev/null 2>&1; }; then
         _type=msvc
@@ -5205,7 +5205,7 @@ probe_cc(){
         fi
         _cc_o='-Fo$@'
         _cc_e='-P -Fi$@'
-        _ld_lib='lib%.a'
+        _ld_lib='%.lib'
         _ld_path='-libpath:'
         _flags='-nologo'
         disable stripping
@@ -5992,9 +5992,6 @@ case $target_os in
     win32|win64)
         disable symver
         if enabled shared; then
-            # Link to the import library instead of the normal static library
-            # for shared libs.
-            LD_LIB='%.lib'
             # Cannot build both shared and static libs with MSVC or icl.
             disable static
         fi
@@ -6002,6 +5999,8 @@ case $target_os in
         enabled x86_32 && check_ldflags -LARGEADDRESSAWARE
         add_cppflags -DWIN32_LEAN_AND_MEAN
         shlibdir_default="$bindir_default"
+        LIBPREF=""
+        LIBSUF=".lib"
         SLIBPREF=""
         SLIBSUF=".dll"
         SLIBNAME_WITH_VERSION='$(SLIBPREF)$(FULLNAME)-$(LIBVERSION)$(SLIBSUF)'

-----------------------------------------------------------------------

Summary of changes:
 configure | 11 +++++------
 1 file changed, 5 insertions(+), 6 deletions(-)


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