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conan_provider.cmake: https://github.com/conan-io/cmake-conan/blob/c22bbf0af0b73d5f0def24a9cdf4ce503ae79e5d/conan_provider.cmake
CMakeLists.txt:
cmake_minimum_required(VERSION 3.15)
project(fooproject LANGUAGES C;CXX)
add_executable(foo main.cpp)
find_package(OpenSSL REQUIRED)
target_link_libraries(foo PUBLIC openssl::openssl)
conanfile.py:
from conan import ConanFile
class LiquidReaderConan(ConanFile):
settings = "os", "compiler", "arch", "build_type"
generators = "CMakeDeps", "CMakeToolchain"
def requirements(self):
self.requires("openssl/1.1.1w#a8f0792d7c5121b954578a7149d23e03")main.cpp:
int main(int argc, char* argv[])
{
return 0;
}$ mkdir build
$ cd build
$ cmake -DCMAKE_PROJECT_TOP_LEVEL_INCLUDES=conan_provider.cmake ..
[...]
C:/Program Files/Microsoft Visual Studio/2022/Professional/VC/Tools/MSVC/14.43.34808/bin/Hostx64/x64/cl.exe /Zi /Fdossl_static.pdb /MDd /Zl /Gs0 /GF /Gy -MDd -Zi -Ob0 -Od -FS -MDd -Zi -Ob0 -Od -FS /I "." /I "include" -D"L_ENDIAN" -D"OPENSSL_PIC" -D"OPENSSL_CPUID_OBJ" -D"OPENSSL_IA32_SSE2" -D"OPENSSL_BN_ASM_MONT" -D"OPENSSL_BN_ASM_MONT5" -D"OPENSSL_BN_ASM_GF2m" -D"SHA1_ASM" -D"SHA256_ASM" -D"SHA512_ASM" -D"KECCAK1600_ASM" -D"RC4_ASM" -D"MD5_ASM" -D"AESNI_ASM" -D"VPAES_ASM" -D"GHASH_ASM" -D"ECP_NISTZ256_ASM" -D"X25519_ASM" -D"POLY1305_ASM" -D"OPENSSLDIR=\"\\res\"" -D"ENGINESDIR=\"\\lib\\engines-1_1\"" -D"OPENSSL_SYS_WIN32" -D"WIN32_LEAN_AND_MEAN" -D"UNICODE" -D"_UNICODE" -D"_CRT_SECURE_NO_DEPRECATE" -D"_WINSOCK_DEPRECATED_NO_WARNINGS" -D"DEBUG" -D"_DEBUG" -c /Foapps\app_rand.obj "apps\app_rand.c"
[...]
LINK : fatal error LNK1181: cannot open input file 'apps\app_rand.obj'
Full log: 20250325-0954-Log.txt
I found a similar report at conan-io/conan-center-index#4740 which found that the problem was the path to cl.exe.
The difference between that ticket and my problem is that mine seems to be specific to conan_provider.cmake, because OpenSSL is successfully built if I use Conan directly, like:
$ conan install --requires openssl/1.1.1w#a8f0792d7c5121b954578a7149d23e03 --build="openssl/*"
Conan v2.12.1
CMake v3.27.7
Visual Studio 2022 v17.13.4
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