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# Search homebrewed keg-only versions of Bison and Flex on macOS.
execute_process(
COMMAND brew --prefix bison
RESULT_VARIABLE HOMEBREW_BISON
OUTPUT_VARIABLE HOMEBREW_BISON_PREFIX
OUTPUT_STRIP_TRAILING_WHITESPACE
)
if (HOMEBREW_BISON EQUAL 0 AND EXISTS "${HOMEBREW_BISON_PREFIX}")
message(STATUS "Using bison keg installed by Homebrew at ${HOMEBREW_BISON_PREFIX}")
set(BISON_EXECUTABLE "${HOMEBREW_BISON_PREFIX}/bin/bison")
endif()
execute_process(
COMMAND brew --prefix flex
RESULT_VARIABLE HOMEBREW_FLEX
OUTPUT_VARIABLE HOMEBREW_FLEX_PREFIX
OUTPUT_STRIP_TRAILING_WHITESPACE
)
if (HOMEBREW_FLEX EQUAL 0 AND EXISTS "${HOMEBREW_FLEX_PREFIX}")
message(STATUS "Using flex keg installed by Homebrew at ${HOMEBREW_FLEX_PREFIX}")
set(FLEX_EXECUTABLE "${HOMEBREW_FLEX_PREFIX}/bin/flex")
endif()
if (OPENSSL_ROOT_DIR)
message(STATUS "Using openssl specified by cmake option: ${OPENSSL_ROOT_DIR}")
else()
# Also, searching homebrewed OpenSSL automatically.
execute_process(
COMMAND brew --prefix openssl
RESULT_VARIABLE HOMEBREW_OPENSSL
OUTPUT_VARIABLE HOMEBREW_OPENSSL_PREFIX
OUTPUT_STRIP_TRAILING_WHITESPACE
)
if (HOMEBREW_OPENSSL EQUAL 0 AND EXISTS "${HOMEBREW_OPENSSL_PREFIX}")
message(STATUS "Using openssl keg installed by Homebrew at ${HOMEBREW_OPENSSL_PREFIX}")
set(OPENSSL_ROOT_DIR "${HOMEBREW_OPENSSL_PREFIX}")
endif()
endif()
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