從原始碼手動編譯 PHP 時出現如下錯誤：
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Undefined symbols for architecture x86_64:
“_PKCS5_PBKDF2_HMAC”, referenced from:
_zif_openssl_pbkdf2 in openssl.o
“_TLSv1_1_client_method”, referenced from:
_php_openssl_setup_crypto in xp_ssl.o
“_TLSv1_1_server_method”, referenced from:
_php_openssl_setup_crypto in xp_ssl.o
“_TLSv1_2_client_method”, referenced from:
_php_openssl_setup_crypto in xp_ssl.o
“_TLSv1_2_server_method”, referenced from:
_php_openssl_setup_crypto in xp_ssl.o
ld: symbol(s) not found for architecture x86_64
clang: error: linker command failed with exit code 1 (use –v to see invocation)
make: *** [libs/libphp5.bundle] Error 1
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MakeFile 裡面找到類似下面這一行：
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EXTRA_LIBS = –lresolv –lmcrypt –lltdl –liconv–lm –lxml2 –lcurl –lssl –lcrypto
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刪除所有的 -lssl 和 -lcrypto 然後新增 libssl.dylib 和 libcrypto.dylib 的路徑（如果你安裝了 brew，那麼則是 /usr/local/opt/openssl/lib/），重新執行 make 命令，done。
附上我修改後的 MakeFile EXTRA_LIBS 那一行：
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EXTRA_LIBS = –lz –lresolv –lmcrypt –lltdl –lstdc++ –liconv –liconv –lpng –lz –lcurl –lz –lm –lxml2 –lz –licucore –lm –lcurl –lxml2 –lz –licucore –lm –licui18n –licuuc –licudata –licuio –lxml2 –lz –licucore –lm –lxml2 –lz –licucore –lm –lxml2 –lz –licucore –lm –lxml2 –lz –licucore –lm /usr/local/opt/openssl/lib/libssl.dylib /usr/local/opt/openssl/lib/libcrypto.dylib
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The Makefile has a line with EXTRA_LIBS, something like:
EXTRA_LIBS = -lresolv -lmcrypt -lltdl -liconv-lm -lxml2 -lcurl -lssl -lcryptoRemove all occurrences of -lssl and -lcrypto and add the full path to libssl.dylib and libcrypto.dylib (brew links openssl to /usr/local/opt/openssl/lib/)
EXTRA_LIBS = -lresolv -lmcrypt /usr/local/opt/openssl/lib/libssl.dylib /usr/local/opt/openssl/lib/libcrypto.dylib -lltdl -liconv-lm -lxml2 -lcurl謀膽並重