cmake: fix brotli lib order

Fix root cause that caused missing symbols when linking brotli
statically with e.g. binutils `ld` (and any other "picky" linker,
or "traditional" linker as CMake now calls them).

Also drop existing workaround that added brotli libs twice to the lib
list.

```
x86_64-w64-mingw32-ld: .../curl/brotli/_bld/usr/lib/libbrotlidec.a(decode.c.obj):decode.c:(.text$ProcessCommands[ProcessCommands]+0xbb5): undefined reference to `BrotliTransformDictionaryWord'
x86_64-w64-mingw32-ld: .../curl/brotli/_bld/usr/lib/libbrotlidec.a(decode.c.obj):decode.c:(.text$SafeProcessCommands[SafeProcessCommands]+0xe8a): undefined reference to `BrotliTransformDictionaryWord'
x86_64-w64-mingw32-ld: .../curl/brotli/_bld/usr/lib/libbrotlidec.a(decode.c.obj):decode.c:(.rdata$.refptr._kBrotliContextLookupTable[.refptr._kBrotliContextLookupTable]+0x0): undefined reference to `_kBrotliContextLookupTable'
x86_64-w64-mingw32-ld: .../curl/brotli/_bld/usr/lib/libbrotlidec.a(decode.c.obj):decode.c:(.rdata$.refptr._kBrotliPrefixCodeRanges[.refptr._kBrotliPrefixCodeRanges]+0x0): undefined reference to `_kBrotliPrefixCodeRanges'
x86_64-w64-mingw32-ld: .../curl/brotli/_bld/usr/lib/libbrotlidec.a(state.c.obj):state.c:(.text$BrotliDecoderStateInit[BrotliDecoderStateInit]+0x21): undefined reference to `BrotliDefaultAllocFunc'
x86_64-w64-mingw32-ld: .../curl/brotli/_bld/usr/lib/libbrotlidec.a(state.c.obj):state.c:(.text$BrotliDecoderStateInit[BrotliDecoderStateInit]+0x2f): undefined reference to `BrotliDefaultFreeFunc'
x86_64-w64-mingw32-ld: .../curl/brotli/_bld/usr/lib/libbrotlidec.a(state.c.obj):state.c:(.text$BrotliDecoderStateInit[BrotliDecoderStateInit]+0x10e): undefined reference to `BrotliSharedDictionaryCreateInstance'
x86_64-w64-mingw32-ld: .../curl/brotli/_bld/usr/lib/libbrotlidec.a(state.c.obj):state.c:(.text$BrotliDecoderStateCleanup[BrotliDecoderStateCleanup]+0xf4): undefined reference to `BrotliSharedDictionaryDestroyInstance'
collect2: error: ld returned 1 exit status
```

Breakage reproducible with curl-for-win config "`win-gcc`" and deleting
the `LDFLAGS+=' -Wl,--start-group'` line from its `curl.sh` script.
(Above line still required for some non-brotli cases, e.g. libssh2 and
zlib.)

Assisted-by: Kai Pastor
Ref: https://github.com/curl/curl/pull/10857#discussion_r1611714989
Follow-up to 1e3319a167d2f32d295603167486e9e88af9bb4e #10857
Closes #13761

diff --git a/CMake/FindBrotli.cmake b/CMake/FindBrotli.cmake
index 11ab7f82545513f90d4877ddb7a5edd675727fd0..dcab8f7cd3204a33bf21b297621a6778835039a6 100644 (file)
--- a/CMake/FindBrotli.cmake
+++ b/CMake/FindBrotli.cmake
@@ -40,4 +40,4 @@ find_package_handle_standard_args(Brotli
 )
 
 set(BROTLI_INCLUDE_DIRS ${BROTLI_INCLUDE_DIR})
-set(BROTLI_LIBRARIES ${BROTLICOMMON_LIBRARY} ${BROTLIDEC_LIBRARY})
+set(BROTLI_LIBRARIES ${BROTLIDEC_LIBRARY} ${BROTLICOMMON_LIBRARY})

diff --git a/CMakeLists.txt b/CMakeLists.txt
index c3525d3fcab06ecec6f4e60cbd40a6d6ec2880a7..65b805c33c150239a17a4b7ed87fe158bedcefd6 100644 (file)
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -580,7 +580,6 @@ if(CURL_BROTLI)
   find_package(Brotli REQUIRED)
   if(BROTLI_FOUND)
     set(HAVE_BROTLI ON)
-    set(CURL_LIBS "${BROTLI_LIBRARIES};${CURL_LIBS}")  # For 'ld' linker. Emulate `list(PREPEND ...)` to stay compatible with <v3.15 CMake.
     list(APPEND CURL_LIBS ${BROTLI_LIBRARIES})
     include_directories(${BROTLI_INCLUDE_DIRS})
     list(APPEND CMAKE_REQUIRED_INCLUDES ${BROTLI_INCLUDE_DIRS})