--- /dev/null
+From 1631a6c1f50e152b8a45d8279c96086e5636795b Mon Sep 17 00:00:00 2001
+From: Christos Tsantilas <christos@chtsanti.net>
+Date: Fri, 25 Jan 2019 06:42:22 -0800
+Subject: [PATCH] Required fixes to compile and run under cygwin
+
+[Retrieved (and backported) from:
+https://github.com/c-icap/c-icap-server/commit/1631a6c1f50e152b8a45d8279c96086e5636795b,
+which has the side effect of fixing the build with the musl C library]
+Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>
+---
+ Makefile.am | 2 +-
+ configure.ac | 10 +++++++---
+ header.c | 34 ----------------------------------
+ include/header.h | 8 --------
+ modules/Makefile.am | 34 ++++++++++++++++++++--------------
+ modules/bdb_tables.c | 17 +++++++++++++++--
+ modules/shared_cache.c | 12 ++++++++++++
+ modules/sys_logger.c | 13 +++++++++++++
+ services/echo/Makefile.am | 10 ++++++++--
+ services/ex-206/Makefile.am | 10 ++++++++--
+ utils/c-icap-mkbdb.c | 8 ++++----
+ 11 files changed, 88 insertions(+), 70 deletions(-)
+
+diff --git a/Makefile.am b/Makefile.am
+index 4c34033..ab80f4f 100644
+--- a/Makefile.am
++++ b/Makefile.am
+@@ -53,7 +53,7 @@ c_icap_SOURCES = aserver.c request.c cfg_param.c \
+ libicapapi_la_CFLAGS= $(INVISIBILITY_CFLAG) -I$(srcdir)/include/ -Iinclude/ @ZLIB_ADD_FLAG@ @OPENSSL_ADD_FLAG@ @BZLIB_ADD_FLAG@ @BROTLI_ADD_FLAG@ @PCRE_ADD_FLAG@ -DCI_BUILD_LIB
+
+ libicapapi_la_LIBADD = @ZLIB_ADD_LDADD@ @BZLIB_ADD_LDADD@ @BROTLI_ADD_LDADD@ @PCRE_ADD_LDADD@ @DL_ADD_FLAG@ @THREADS_LDADD@ @OPENSSL_ADD_LDADD@
+-libicapapi_la_LDFLAGS= -shared -version-info @CICAPLIB_VERSION@ @THREADS_LDFLAGS@
++libicapapi_la_LDFLAGS= -shared -version-info @CICAPLIB_VERSION@ @LIBS_LDFLAGS@ @THREADS_LDFLAGS@
+
+ export EXT_PROGRAMS_MKLIB = @ZLIB_LNDIR_LDADD@ @BZLIB_LNDIR_LDADD@ @BROTLI_LNDIR_LDADD@ @PCRE_LNDIR_LDADD@ @OPENSSL_LNDIR_LDADD@
+
+diff --git a/configure.ac b/configure.ac
+index 405571b..8059cb7 100644
+--- a/configure.ac
++++ b/configure.ac
+@@ -45,12 +45,14 @@ case "$host_os" in
+ CFLAGS="-D_REENTRANT $CFLAGS"
+ THREADS_LDADD="-lpthread"
+ THREADS_LDFLAGS=""
++ LIBS_LDFLAGS=""
+ ;;
+ solaris2.*)
+ CFLAGS="-D_REENTRANT -D_POSIX_PTHREAD_SEMANTICS $CFLAGS"
+ LIBS="-lsocket -lnsl -lrt $LIBS"
+ THREADS_LDADD="-lpthread"
+ THREADS_LDFLAGS=""
++ LIBS_LDFLAGS=""
+ ;;
+ freebsd5*)
+ ## If I understand how all those threading models works correctly
+@@ -69,6 +71,7 @@ case "$host_os" in
+ CFLAGS="-pthread -D_THREAD_SAFE $CFLAGS"
+ THREADS_LDADD="-XCClinker -lc_r"
+ THREADS_LDFLAGS=""
++ LIBS_LDFLAGS=""
+ ## FreeBSD has pthreads rwlocks from version 3 (I think)
+ # AC_DEFINE(HAVE_PTHREADS_RWLOCK,1,[Define HAVE_PTHREADS_RWLOCK if pthreads library supports rwlocks])
+ ## 1:1 threads
+@@ -82,24 +85,28 @@ case "$host_os" in
+ CFLAGS="-D_THREAD_SAFE $CFLAGS"
+ THREADS_LDADD="-XCClinker -lthr"
+ THREADS_LDFLAGS=""
++ LIBS_LDFLAGS=""
+ ;;
+
+ cygwin*)
+ CFLAGS="-D_REENTRANT $CFLAGS"
+ THREADS_LDADD="-lpthread"
+ THREADS_LDFLAGS="";
++ LIBS_LDFLAGS="-no-undefined"
+ iscygwin="yes"
+ ;;
+ *)
+ CFLAGS="-D_REENTRANT $CFLAGS"
+ THREADS_LDADD="-lpthread"
+ THREADS_LDFLAGS=""
++ LIBS_LDFLAGS=""
+ ;;
+ esac
+
+ TEST_LIBS="$TEST_LIBS $THREADS_LDADD"
+ AC_SUBST(THREADS_LDADD)
+ AC_SUBST(THREADS_LDFLAGS)
++AC_SUBST(LIBS_LDFLAGS)
+
+ AC_DEFINE_UNQUOTED(C_ICAP_CONFIGURE_OPTIONS, "$ac_configure_args",
+ [configure command line used to configure c-icap])
+@@ -984,9 +991,6 @@ LIBS="$LIBS $EXTRALIBS"
+
+ #Configure common flags
+ MODULES_LIBADD=""
+-if test a"$iscygwin" != a; then
+- MODULES_LIBADD="-L../../ -licapapi"
+-fi
+ MODULES_CFLAGS="$INVISIBILITY_CFLAG -DCI_BUILD_MODULE"
+ AC_SUBST(MODULES_LIBADD)
+ AC_SUBST(MODULES_CFLAGS)
+diff --git a/header.c b/header.c
+index 807a2e0..266b958 100644
+--- a/header.c
++++ b/header.c
+@@ -110,21 +110,6 @@ const struct ci_error_code ci_error_codes[] = {
+ {505, "Unsupported version"} /*ICAP version not supported by server. */
+ };
+
+-/*
+-#ifdef __CYGWIN__
+-int ci_error_code(int ec){
+- return (ec >= EC_100 && ec < EC_MAX ? ci_error_codes[ec].code:1000);
+-}
+-
+-const char *unknownerrorcode = "UNKNOWN ERROR CODE";
+-
+-const char *ci_error_code_string(int ec){
+- return (ec >= EC_100 && ec < EC_MAX?ci_error_codes[ec].str:unknownerrorcode);
+-}
+-#endif
+-*/
+-
+-
+ const char *ci_encaps_entities[] = {
+ "req-hdr",
+ "res-hdr",
+@@ -134,25 +119,6 @@ const char *ci_encaps_entities[] = {
+ "opt-body"
+ };
+
+-#ifdef __CYGWIN__
+-
+-const char *unknownentity = "UNKNOWN";
+-const char *unknownmethod = "UNKNOWN";
+-
+-const char *ci_method_string(int method)
+-{
+- return (method <= ICAP_RESPMOD
+- && method >= ICAP_OPTIONS ? CI_Methods[method] : unknownmethod);
+-}
+-
+-
+-const char *ci_encaps_entity_string(int e)
+-{
+- return (e <= ICAP_OPT_BODY
+- && e >= ICAP_REQ_HDR ? CI_EncapsEntities[e] : unknownentity);
+-}
+-#endif
+-
+ ci_headers_list_t *ci_headers_create()
+ {
+ ci_headers_list_t *h;
+diff --git a/include/header.h b/include/header.h
+index 4cab365..ed2de88 100644
+--- a/include/header.h
++++ b/include/header.h
+@@ -52,16 +52,8 @@ enum ci_encapsulated_entities {ICAP_REQ_HDR, ICAP_RES_HDR,
+ };
+ CI_DECLARE_DATA extern const char *ci_encaps_entities[];
+
+-#ifdef __CYGWIN__
+-
+-const char *ci_encaps_entity_string(int e);
+-
+-#else
+-
+ #define ci_encaps_entity_string(e) (e <= ICAP_OPT_BODY && e >= ICAP_REQ_HDR?ci_encaps_entities[e]:"UNKNOWN")
+
+-#endif
+-
+ /**
+ \typedef ci_headers_list_t
+ \ingroup HEADERS
+diff --git a/modules/Makefile.am b/modules/Makefile.am
+index e6e9270..2d43a60 100644
+--- a/modules/Makefile.am
++++ b/modules/Makefile.am
+@@ -21,38 +21,44 @@ endif
+
+ AM_CPPFLAGS=-I$(top_srcdir)/ -I$(top_srcdir)/include/ -I$(top_builddir)/include/
+
+-sys_logger_la_LIBADD = @MODULES_LIBADD@
++if ISCYGWIN
++MODS_LIB_ADD=$(top_builddir)/libicapapi.la
++else
++MODS_LIB_ADD=
++endif
++
++sys_logger_la_LIBADD = $(MODS_LIB_ADD)
+ sys_logger_la_CFLAGS= @MODULES_CFLAGS@ @OPENSSL_ADD_FLAG@
+-sys_logger_la_LDFLAGS= -module -avoid-version
++sys_logger_la_LDFLAGS= -module -avoid-version @LIBS_LDFLAGS@
+ sys_logger_la_SOURCES = sys_logger.c
+
+-dnsbl_tables_la_LIBADD = @MODULES_LIBADD@
++dnsbl_tables_la_LIBADD = $(MODS_LIB_ADD)
+ dnsbl_tables_la_CFLAGS= @MODULES_CFLAGS@ @OPENSSL_ADD_FLAG@
+-dnsbl_tables_la_LDFLAGS= -module -avoid-version
++dnsbl_tables_la_LDFLAGS= -module -avoid-version @LIBS_LDFLAGS@
+ dnsbl_tables_la_SOURCES = dnsbl_tables.c
+
+-perl_handler_la_LIBADD = @MODULES_LIBADD@ @perllib@ -L@perlcore@ -lperl
++perl_handler_la_LIBADD = $(MODS_LIB_ADD) @perllib@ -L@perlcore@ -lperl
+ perl_handler_la_CFLAGS= @MODULES_CFLAGS@ @perlccflags@ -I@perlcore@
+-perl_handler_la_LDFLAGS= -module -avoid-version @perlldflags@
++perl_handler_la_LDFLAGS= -module -avoid-version @LIBS_LDFLAGS@ @perlldflags@
+ perl_handler_la_SOURCES = perl_handler.c
+
+
+-bdb_tables_la_LIBADD = @MODULES_LIBADD@ @BDB_ADD_LDADD@
++bdb_tables_la_LIBADD = $(MODS_LIB_ADD) @BDB_ADD_LDADD@
+ bdb_tables_la_CFLAGS= @MODULES_CFLAGS@ @BDB_ADD_FLAG@
+-bdb_tables_la_LDFLAGS= -module -avoid-version
++bdb_tables_la_LDFLAGS= -module -avoid-version @LIBS_LDFLAGS@
+ bdb_tables_la_SOURCES = bdb_tables.c
+
+-ldap_module_la_LIBADD = @MODULES_LIBADD@ @LDAP_ADD_LDADD@ $(top_builddir)/libicapapi.la
++ldap_module_la_LIBADD = $(MODS_LIB_ADD) @LDAP_ADD_LDADD@
+ ldap_module_la_CFLAGS= @MODULES_CFLAGS@ @LDAP_ADD_FLAG@
+-ldap_module_la_LDFLAGS= -module -avoid-version
++ldap_module_la_LDFLAGS= -module -avoid-version @LIBS_LDFLAGS@
+ ldap_module_la_SOURCES = ldap_module.c
+
+-memcached_cache_la_LIBADD= @MODULES_LIBADD@ @MEMCACHED_ADD_LDADD@
++memcached_cache_la_LIBADD= $(MODS_LIB_ADD) @MEMCACHED_ADD_LDADD@
+ memcached_cache_la_CFLAGS= @MODULES_CFLAGS@ @MEMCACHED_ADD_FLAG@
+-memcached_cache_la_LDFLAGS= -module -avoid-version
++memcached_cache_la_LDFLAGS= -module -avoid-version @LIBS_LDFLAGS@
+ memcached_cache_la_SOURCES= memcached.c
+
+-shared_cache_la_LIBADD= @MODULES_LIBADD@
++shared_cache_la_LIBADD= $(MODS_LIB_ADD)
+ shared_cache_la_CFLAGS= @OPENSSL_ADD_FLAG@
+-shared_cache_la_LDFLAGS= -module -avoid-version
++shared_cache_la_LDFLAGS= -module -avoid-version @LIBS_LDFLAGS@
+ shared_cache_la_SOURCES= shared_cache.c
+diff --git a/modules/bdb_tables.c b/modules/bdb_tables.c
+index b8459be..1e908a9 100644
+--- a/modules/bdb_tables.c
++++ b/modules/bdb_tables.c
+@@ -176,8 +176,8 @@ void *bdb_table_open(struct ci_lookup_table *table)
+
+ /*We can not fork a Berkeley DB table, so we have to
+ open bdb tables for every child, on childs start-up procedure*/
+- register_command_extend("openBDBtable", CHILD_START_CMD, table,
+- command_real_open_table);
++ ci_command_register_action("openBDBtable", CHILD_START_CMD, table,
++ command_real_open_table);
+
+ return table->data;
+ }
+@@ -257,3 +257,16 @@ void bdb_table_release_result(struct ci_lookup_table *table,void **val)
+ {
+ ci_buffer_free(val);
+ }
++
++ #ifdef __CYGWIN__
++#include <w32api/windows.h>
++void ci_command_register_action(const char *name, int type, void *data,
++ void (*command_action) (const char *name, int type, void *data))
++ {
++ typedef void (*RA)(const char *, int, void *, void(*)(const char *, int, void *));
++ RA fn;
++ fn = (RA)GetProcAddress(GetModuleHandle(NULL), "ci_command_register_action");
++ if (fn)
++ (*fn)(name, type, data, command_action);
++ }
++#endif
+diff --git a/modules/shared_cache.c b/modules/shared_cache.c
+index 103b760..a79d51a 100644
+--- a/modules/shared_cache.c
++++ b/modules/shared_cache.c
+@@ -345,3 +345,15 @@ void ci_shared_cache_destroy(struct ci_cache *cache)
+ ci_shared_mem_detach(&data->id);
+ }
+
++#ifdef __CYGWIN__
++#include <w32api/windows.h>
++void ci_command_register_action(const char *name, int type, void *data,
++ void (*command_action) (const char *name, int type, void *data))
++ {
++ typedef void (*RA)(const char *, int, void *, void(*)(const char *, int, void *));
++ RA fn;
++ fn = (RA)GetProcAddress(GetModuleHandle(NULL), "ci_command_register_action");
++ if (fn)
++ (*fn)(name, type, data, command_action);
++ }
++#endif
+diff --git a/modules/sys_logger.c b/modules/sys_logger.c
+index 1c47753..1764b0d 100644
+--- a/modules/sys_logger.c
++++ b/modules/sys_logger.c
+@@ -60,7 +60,20 @@ int cfg_syslog_access(const char *directive, const char **argv, void *setdata);
+ functions declared in log.c. This file is not included in c-icap library
+ but defined in primary c-icap binary.
+ */
++#ifdef __CYGWIN__
++#include <w32api/windows.h>
++char *logformat_fmt(const char *name)
++{
++ typedef char* (*LF_FMT)(const char *);
++ LF_FMT fn;
++ fn = (LF_FMT)GetProcAddress(GetModuleHandle(NULL), "logformat_fmt");
++ if (fn)
++ return (*fn)(name);
++ return NULL;
++}
++#else
+ extern char *logformat_fmt(const char *name);
++#endif
+
+ /*Configuration Table .....*/
+ static struct ci_conf_entry conf_variables[] = {
+diff --git a/services/echo/Makefile.am b/services/echo/Makefile.am
+index 402c8f9..7d701b1 100644
+--- a/services/echo/Makefile.am
++++ b/services/echo/Makefile.am
+@@ -3,9 +3,15 @@ pkglib_LTLIBRARIES=srv_echo.la
+
+ AM_CPPFLAGS=-I$(top_srcdir)/ -I$(top_srcdir)/include/ -I$(top_builddir)/include/
+
+-srv_echo_la_LIBADD = @MODULES_LIBADD@
++if ISCYGWIN
++MODS_LIB_ADD=$(top_builddir)/libicapapi.la
++else
++MODS_LIB_ADD=
++endif
++
++srv_echo_la_LIBADD = $(MODS_LIB_ADD)
+ srv_echo_la_CFLAGS= @MODULES_CFLAGS@ @OPENSSL_ADD_FLAG@
+-srv_echo_la_LDFLAGS= -module -avoid-version
++srv_echo_la_LDFLAGS= -module -avoid-version @LIBS_LDFLAGS@
+ srv_echo_la_SOURCES = srv_echo.c
+
+
+diff --git a/services/ex-206/Makefile.am b/services/ex-206/Makefile.am
+index 44bbf21..ff73399 100644
+--- a/services/ex-206/Makefile.am
++++ b/services/ex-206/Makefile.am
+@@ -3,8 +3,14 @@ pkglib_LTLIBRARIES=srv_ex206.la
+
+ AM_CPPFLAGS=-I$(top_srcdir)/ -I$(top_srcdir)/include/ -I$(top_builddir)/include/
+
+-srv_ex206_la_LIBADD = @MODULES_LIBADD@
++if ISCYGWIN
++MODS_LIB_ADD=$(top_builddir)/libicapapi.la
++else
++MODS_LIB_ADD=
++endif
++
++srv_ex206_la_LIBADD = $(MODS_LIB_ADD)
+ srv_ex206_la_CFLAGS= @MODULES_CFLAGS@ @OPENSSL_ADD_FLAG@
+-srv_ex206_la_LDFLAGS= -module -avoid-version
++srv_ex206_la_LDFLAGS= -module -avoid-version @LIBS_LDFLAGS@
+ srv_ex206_la_SOURCES = srv_ex206.c
+
+diff --git a/utils/c-icap-mkbdb.c b/utils/c-icap-mkbdb.c
+index c29a46f..326ee1c 100644
+--- a/utils/c-icap-mkbdb.c
++++ b/utils/c-icap-mkbdb.c
+@@ -23,7 +23,7 @@ char *dbfile = NULL;
+ int DUMP_MODE = 0;
+ int VERSION_MODE = 0;
+ int USE_DBTREE = 0;
+-long int PAGE_SIZE;
++long int DB_PAGE_SIZE;
+
+ ci_mem_allocator_t *allocator = NULL;
+ int cfg_set_type(const char *directive, const char **argv, void *setdata);
+@@ -52,7 +52,7 @@ static struct ci_options_entry options[] = {
+ "The type of values"
+ },
+ {
+- "-p", "page_size", &PAGE_SIZE, ci_cfg_size_long,
++ "-p", "page_size", &DB_PAGE_SIZE, ci_cfg_size_long,
+ "The page size to use for the database"
+ },
+ {
+@@ -107,8 +107,8 @@ int open_db(char *path)
+ return 0;
+ }
+
+- if (PAGE_SIZE > 512 && PAGE_SIZE <= 64*1024)
+- db->set_pagesize(db, (uint32_t)PAGE_SIZE);
++ if (DB_PAGE_SIZE > 512 && DB_PAGE_SIZE <= 64*1024)
++ db->set_pagesize(db, (uint32_t)DB_PAGE_SIZE);
+
+ if ((ret = db->open(db, NULL, path, NULL,
+ (USE_DBTREE ? DB_BTREE : DB_HASH),
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