macOS Sierra: add pkg-config files

Library/ENV/pkgconfig/10.12/libcurl.pc

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+#***************************************************************************
+#                                  _   _ ____  _
+#  Project                     ___| | | |  _ \| |
+#                             / __| | | | |_) | |
+#                            | (__| |_| |  _ <| |___
+#                             \___|\___/|_| \_\_____|
+#
+# Copyright (C) 2004 - 2012, Daniel Stenberg, <daniel@haxx.se>, et al.
+#
+# This software is licensed as described in the file COPYING, which
+# you should have received as part of this distribution. The terms
+# are also available at http://curl.haxx.se/docs/copyright.html.
+#
+# You may opt to use, copy, modify, merge, publish, distribute and/or sell
+# copies of the Software, and permit persons to whom the Software is
+# furnished to do so, under the terms of the COPYING file.
+#
+# This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
+# KIND, either express or implied.
+#
+###########################################################################
+
+# This should most probably benefit from getting a "Requires:" field added
+# dynamically by configure.
+#
+prefix=/usr
+exec_prefix=${prefix}
+libdir=${exec_prefix}/lib
+includedir=${prefix}/include
+supported_protocols="DICT FILE FTP FTPS GOPHER HTTP HTTPS IMAP IMAPS LDAP LDAPS POP3 POP3S RTSP SMB SMBS SMTP SMTPS TELNET TFTP"
+supported_features="Largefile Kerberos SPNEGO SSL IPv6 libz AsynchDNS NTLM NTLM_WB GSS-API UnixSockets"
+
+Name: libcurl
+URL: https://curl.haxx.se/
+Description: Library to transfer files with ftp, http, etc.
+Version: 7.43.0
+Libs: -L${libdir} -lcurl
+Libs.private: -lssl -lcrypto -Wl,-weak-lldap -Wl,-weak-lgssapi_krb5 -lresolv -lssl -lcrypto -lz -lz
+Cflags: -I${includedir}

Library/ENV/pkgconfig/10.12/libexslt.pc

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+prefix=/usr
+exec_prefix=${prefix}
+libdir=${exec_prefix}/lib
+includedir=${prefix}/include
+
+
+Name: libexslt
+Version: 0.8.17
+Description: EXSLT Extension library
+Requires: libxml-2.0
+Libs: -L${libdir} -lexslt -lxslt  -lxml2 -lz -lpthread -licucore -lm
+Cflags: -I${includedir}

Library/ENV/pkgconfig/10.12/libxml-2.0.pc

@@ -0,0 +1,13 @@
+prefix=/usr
+exec_prefix=${prefix}
+libdir=${exec_prefix}/lib
+includedir=${prefix}/include
+modules=1
+
+Name: libXML
+Version: 2.9.3
+Description: libXML library version2.
+Requires:
+Libs: -L${libdir} -lxml2
+Libs.private: -lpthread -lz  -lm
+Cflags: -I${includedir}/libxml2

Library/ENV/pkgconfig/10.12/libxslt.pc

@@ -0,0 +1,12 @@
+prefix=/usr
+exec_prefix=${prefix}
+libdir=${exec_prefix}/lib
+includedir=${prefix}/include
+
+
+Name: libxslt
+Version: 1.1.28
+Description: XSLT library version 2.
+Requires: libxml-2.0
+Libs: -L${libdir} -lxslt  -lxml2 -lz -lpthread -licucore -lm
+Cflags: -I${includedir}

Library/ENV/pkgconfig/10.12/sqlite3.pc

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+prefix=/usr
+exec_prefix=${prefix}
+libdir=${exec_prefix}/lib
+includedir=${prefix}/include
+
+Name: SQLite
+Description: SQL database engine
+Version: 3.13.0
+Libs: -L${libdir} -lsqlite3
+Libs.private:
+Cflags: -I${includedir}

Library/ENV/pkgconfig/10.12/zlib.pc

@@ -0,0 +1,13 @@
+prefix=/usr
+exec_prefix=${prefix}
+libdir=${exec_prefix}/lib
+sharedlibdir=${libdir}
+includedir=${prefix}/include
+
+Name: zlib
+Description: zlib compression library
+Version: 1.2.5
+
+Requires:
+Libs: -L${libdir} -L${sharedlibdir} -lz
+Cflags: -I${includedir}