Allow configure to complete successfully on mingw.

Originally titled: [patch 02/17] Windows library dependencies
---
Windows symbols may a suffix of @<arg count>.

A new macro APR_CHECK_DLL_FUNC looks for a @ sign in the function name; when
present it will verify a symbol exists with the correct argument count.
Otherwise, APR_CHECK_DLL_FUNC falls back to emulating AC_CHECK_LIB.

Enables native threads, locking, DSO loading and shared memory.
---

Submitted by: John Mark Vandenberg
Tweaked by: Justin Erenkrantz


git-svn-id: https://svn.apache.org/repos/asf/apr/apr/trunk@421013 13f79535-47bb-0310-9956-ffa450edef68

Author: Justin Erenkrantz

build/apr_hints.m4

@@ -422,6 +422,9 @@ dnl	       # Not a problem in 10.20.  Otherwise, who knows?
     *cygwin*)
 	APR_ADDTO(CPPFLAGS, [-DCYGWIN])
 	;;
+    *mingw*)
+	APR_ADDTO(LDFLAGS, [-Wl,--enable-auto-import,--subsystem,console])
+	;;
   esac
 
 fi

build/apr_win32.m4

@@ -0,0 +1,33 @@
+
+dnl if $2 contains '@dd', links against mingw symbols
+dnl otherwise calls AC_CHECK_LIB
+AC_DEFUN([APR_CHECK_DLL_FUNC],[
+m4_define($1_function_name,m4_substr($2,0,m4_index($2,[@])))
+m4_define($1_function_arglength,m4_substr($2,m4_incr(m4_index($2,[@]))))
+m4_define($1_[function_name]_arglength,m4_substr($2,m4_incr(m4_index($2,[@]))))
+dnl m4_define(apr_check_dll_id,$1_m4_defn($1_function_name))
+
+AC_CACHE_CHECK([for $2 in $1],[ac_cv_lib_$1_]$1_function_name,[
+
+ac_func_search_save_LIBS=$LIBS
+LIBS="$LIBS -l$1"
+
+AC_TRY_LINK([
+#pragma pack(1)
+struct x {
+]m4_for([byte_id], 1, m4_defn([$1_function_name_arglength]), 1,[[ char c]]byte_id;
+)[};
+__stdcall ]$1_function_name[(]struct x[);],[
+struct x s = {0};
+]$1_function_name[(s)],
+[ac_cv_lib_$1_]$1_function_name[=yes],[ac_cv_lib_$1_]$1_function_name[=no])
+LIBS=$ac_func_search_save_LIBS
+])dnl AC_CACHE_CHECK
+
+AS_IF([test $ac_cv_lib_$1_]$1_function_name[ = yes],
+      [m4_default([$3], [AC_DEFINE_UNQUOTED(AS_TR_CPP(HAVE_LIB$1),,Enable if this library is available)
+  LIBS="-l$1 $LIBS"
+])],
+    [$4])dnl
+])
+

configure.in

@@ -16,6 +16,7 @@ dnl
 sinclude(build/apr_common.m4)
 sinclude(build/apr_network.m4)
 sinclude(build/apr_threads.m4)
+sinclude(build/apr_win32.m4)
 sinclude(build/apr_hints.m4)
 sinclude(build/libtool.m4)
 sinclude(build/ltsugar.m4)
@@ -404,6 +405,12 @@ case $host in
        OSDIR="as400"
        eolstr="\\n"
        ;;
+   *mingw*)
+       OSDIR="win32"
+       enable_threads="system_threads"
+       eolstr="\\n"
+       OBJECTS_PLATFORM='$(OBJECTS_win32)'
+       ;;
    *cygwin*)
        OSDIR="unix"
        APR_ADDTO(CPPFLAGS,-DCYGWIN)
@@ -520,12 +527,27 @@ dnl Note: Autoconf will always append LIBS with an extra " " in AC_CHECK_LIB.
 dnl It should check for LIBS being empty and set LIBS equal to the new value 
 dnl without the extra " " in that case, but they didn't do that.  So, we
 dnl end up LIBS="-lm -lcrypt -lnsl  -ldl" which is an annoyance.
-AC_SEARCH_LIBS(gethostbyname, nsl)
-AC_SEARCH_LIBS(gethostname, nsl)
-AC_SEARCH_LIBS(socket, socket)
-AC_SEARCH_LIBS(crypt, crypt ufc)
-AC_CHECK_LIB(truerand, main)
-AC_SEARCH_LIBS(modf, m)
+case $host in
+   *mingw*)
+      dnl APR_ADDTO(LIBS,[-lmsvcrt --lshell32 -ladvapi32 -lws2_32])
+
+      AC_CHECK_LIB(msvcrt, getpid)
+      APR_CHECK_DLL_FUNC(kernel32, SetErrorMode@4)
+      APR_CHECK_DLL_FUNC(advapi32, GetSecurityInfo@32)
+      APR_CHECK_DLL_FUNC(ws2_32, gethostbyname@4)
+      APR_CHECK_DLL_FUNC(shell32, CommandLineToArgvW@8)
+      APR_CHECK_DLL_FUNC(kernel32,[CreateFileMappingA@24],
+         [ac_cv_func_CreateFileMapping=$ac_cv_lib_kernel32_CreateFileMappingA])
+      ;;
+   *)
+      AC_SEARCH_LIBS(gethostbyname, nsl)
+      AC_SEARCH_LIBS(gethostname, nsl)
+      AC_SEARCH_LIBS(socket, socket)
+      AC_SEARCH_LIBS(crypt, crypt ufc)
+      AC_CHECK_LIB(truerand, main)
+      AC_SEARCH_LIBS(modf, m)
+       ;;
+esac
 
 dnl ----------------------------- Checking for Threads
 echo "${nl}Checking for Threads..."
@@ -698,9 +720,10 @@ case $host in
 #endif";;
 esac
 
-AC_CHECK_HEADERS([sys/types.h sys/mman.h sys/ipc.h sys/mutex.h sys/shm.h sys/file.h kernel/OS.h os2.h])
+AC_CHECK_HEADERS([sys/types.h sys/mman.h sys/ipc.h sys/mutex.h sys/shm.h sys/file.h kernel/OS.h os2.h windows.h])
 AC_CHECK_FUNCS([mmap munmap shm_open shm_unlink shmget shmat shmdt shmctl \
                 create_area])
+
 APR_CHECK_DEFINE(MAP_ANON, sys/mman.h)
 APR_CHECK_FILE(/dev/zero)
 
@@ -760,6 +783,10 @@ APR_IFALLYES(header:kernel/OS.h func:create_area,
              [havebeosshm="1"
               APR_DECIDE(USE_SHMEM_BEOS_ANON,
                          [BeOS areas])])
+APR_IFALLYES(header:windows.h func:CreateFileMapping,
+             [havewin32shm="1"
+              APR_DECIDE(USE_SHMEM_WIN32_ANON,
+                         [Windows CreateFileMapping()])])
 case $host in
     *linux* ) 
         # Linux has problems with MM_SHMT_MMANON even though it reports
@@ -806,6 +833,7 @@ havemmapshm="0"
 haveshmget="0"
 havebeosarea="0"
 haveos2shm="0"
+havewin32shm="0"
 APR_BEGIN_DECISION([namebased memory allocation method])
 APR_IFALLYES(header:sys/mman.h func:mmap func:munmap,
              [havemmaptmp="1"
@@ -826,6 +854,9 @@ APR_IFALLYES(header:kernel/OS.h func:create_area,
 APR_IFALLYES(header:os2.h,
              [haveos2shm="1"
               APR_DECIDE(USE_SHMEM_OS2, [OS/2 DosAllocSharedMem()])])
+APR_IFALLYES(header:windows.h,
+             [havewin32shm="1"
+              APR_DECIDE(USE_SHMEM_WIN32, [Windows shared memory])])
 case $host in
     *linux* ) 
         # Linux has problems with MM_SHMT_MMANON even though it reports
@@ -846,6 +877,7 @@ usemmapshm="0"
 useshmget="0"
 usebeosarea="0"
 useos2shm="0"
+usewin32shm="0"
 
 case $ac_decision in
     USE_SHMEM_MMAP_TMP )
@@ -863,10 +895,13 @@ case $ac_decision in
     USE_SHMEM_OS2 )
         useos2shm="1"
         ;;
+    USE_SHMEM_WIN32 )
+        usewin32shm="1"
+        ;;
 esac
 
 # Do we have any shared memory support?
-if test "$usemmaptmp$usemmapshm$usemmapzero$useshmget$usemmapanon$usebeosarea$useos2shm" = "0000000"; then
+if test "$usemmaptmp$usemmapshm$usemmapzero$useshmget$usemmapanon$usebeosarea$useos2shm$usewin32shm" = "00000000"; then
   sharedmem="0"
 else
   sharedmem="1"
@@ -877,11 +912,13 @@ AC_SUBST(usemmapshm)
 AC_SUBST(useshmget)
 AC_SUBST(usebeosarea)
 AC_SUBST(useos2shm)
+AC_SUBST(usewin32shm)
 AC_SUBST(havemmaptmp)
 AC_SUBST(havemmapshm)
 AC_SUBST(haveshmget)
 AC_SUBST(havebeosarea)
 AC_SUBST(haveos2shm)
+AC_SUBST(havewin32shm)
 AC_SUBST(sharedmem)
 
 dnl ----------------------------- Checks for Any required Functions
@@ -1462,7 +1499,7 @@ if test "$dsotype" = "any"; then
     # Everything else:
     if test "$dsotype" = "any"; then
         case $host in
-        *os390|*-os2*|*os400|*-aix*) dsotype=other ;;
+        *os390|*-os2*|*os400|*-aix*|*mingw*) dsotype=other ;;
         esac
     fi
 fi
@@ -1658,6 +1695,11 @@ APR_IFALLYES(header:OS.h func:create_sem,
 if test "x$apr_lock_method" != "x"; then
     APR_DECISION_FORCE($apr_lock_method)
 fi
+case "$host" in
+    *mingw* )
+        APR_DECISION_FORCE(win32)
+        ;;
+esac
 APR_END_DECISION
 AC_DEFINE_UNQUOTED($ac_decision)