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cmake/Find*: clear package version after pkg-config detection

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`pkg_check_modules()` seems to leave `<PACKAGE>_VERSION` defined with an
empty value, if the package is not found.

When the package is also not found in the fallback branch,
`find_package_handle_standard_args()` logs and error message. In this
message it includes the bogus empty value as: `(found version "")`:
```
  Could NOT find Libgcrypt (missing: LIBGCRYPT_INCLUDE_DIR LIBGCRYPT_LIBRARY)
  (found version "")
```

Clear the version number to avoid the confusion:
```
  Could NOT find Libgcrypt (missing: LIBGCRYPT_INCLUDE_DIR LIBGCRYPT_LIBRARY)
```

Seen with CMake v3.30.3 and 3.30.5.

Closes #1479
This commit is contained in:
Viktor Szakats
2024-10-25 03:09:20 +02:00
parent ac00f6c437
commit d4e43c7b69
3 changed files with 3 additions and 0 deletions
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1
cmake/FindMbedTLS.cmake
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@ -32,6 +32,7 @@ else()
find_path(MBEDTLS_INCLUDE_DIR NAMES "mbedtls/version.h")
find_library(MBEDCRYPTO_LIBRARY NAMES "mbedcrypto" "libmbedcrypto")
unset(MBEDTLS_VERSION CACHE)
if(MBEDTLS_INCLUDE_DIR)
if(EXISTS "${MBEDTLS_INCLUDE_DIR}/mbedtls/build_info.h") # 3.x
set(_version_header "${MBEDTLS_INCLUDE_DIR}/mbedtls/build_info.h")