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# Select a hash backend
include(SanitizeBool)
# USE_SHA1=CollisionDetection(ON)/HTTPS/Generic/OFF
sanitizebool(USE_SHA1)
if(USE_SHA1 STREQUAL ON)
SET(USE_SHA1 "CollisionDetection")
elseif(USE_SHA1 STREQUAL "HTTPS")
if(USE_HTTPS STREQUAL "SecureTransport")
set(USE_SHA1 "CommonCrypto")
elseif(USE_HTTPS STREQUAL "WinHTTP")
set(USE_SHA1 "Win32")
elseif(USE_HTTPS)
set(USE_SHA1 ${USE_HTTPS})
else()
set(USE_SHA1 "CollisionDetection")
endif()
endif()
if(USE_SHA1 STREQUAL "CollisionDetection")
set(GIT_SHA1_COLLISIONDETECT 1)
add_definitions(-DSHA1DC_NO_STANDARD_INCLUDES=1)
add_definitions(-DSHA1DC_CUSTOM_INCLUDE_SHA1_C=\"common.h\")
add_definitions(-DSHA1DC_CUSTOM_INCLUDE_UBC_CHECK_C=\"common.h\")
elseif(USE_SHA1 STREQUAL "OpenSSL")
# OPENSSL_FOUND should already be set, we're checking USE_HTTPS
set(GIT_SHA1_OPENSSL 1)
if(CMAKE_SYSTEM_NAME MATCHES "FreeBSD")
list(APPEND LIBGIT2_PC_LIBS "-lssl")
else()
list(APPEND LIBGIT2_PC_REQUIRES "openssl")
endif()
elseif(USE_SHA1 STREQUAL "CommonCrypto")
set(GIT_SHA1_COMMON_CRYPTO 1)
elseif(USE_SHA1 STREQUAL "mbedTLS")
set(GIT_SHA1_MBEDTLS 1)
list(APPEND LIBGIT2_SYSTEM_INCLUDES ${MBEDTLS_INCLUDE_DIR})
list(APPEND LIBGIT2_SYSTEM_LIBS ${MBEDTLS_LIBRARIES})
# mbedTLS has no pkgconfig file, hence we can't require it
# https://github.com/ARMmbed/mbedtls/issues/228
# For now, pass its link flags as our own
list(APPEND LIBGIT2_PC_LIBS ${MBEDTLS_LIBRARIES})
elseif(USE_SHA1 STREQUAL "Win32")
set(GIT_SHA1_WIN32 1)
elseif(NOT (USE_SHA1 STREQUAL "Generic"))
message(FATAL_ERROR "Asked for unknown SHA1 backend: ${USE_SHA1}")
endif()
add_feature_info(SHA ON "using ${USE_SHA1}")
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