X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/1ff6a165a39066837a69473d30cda37a8f82fcba..38a4ddd52d0b7282c0b50464bd64d91070677f08:/configure.in

diff --git a/configure.in b/configure.in
index cf6571d195..b96b715a3c 100644
--- a/configure.in
+++ b/configure.in
@@ -2115,6 +2115,41 @@ dnl also put 64 bit versions for Linux on AMD, they must come before the usual
 dnl locations or 64 bit compilation failed
 SEARCH_LIB="/usr/lib /usr/lib32 /usr/lib64 /usr/X11R6/lib64 `echo "$SEARCH_INCLUDE" | sed s/include/lib/g`"
 
+dnl Cross compiling with gcc?
+if test "$build" != "$host" -a "$GCC" = yes; then
+    dnl for gcc cross-compilers "$CC -print-prog-name=ld" prints the path to
+    dnl the linker. Stripping off the trailing '/bin/ld' gives us a candiate
+    dnl for a 'root' below which libraries and headers for the target system
+    dnl might be installed.
+    if cross_root=`$CC -print-prog-name=ld 2>/dev/null`; then
+        cross_root=`dirname $cross_root`
+        cross_root=`dirname $cross_root`
+
+        dnl substitute this candiate root for '^/usr' in the search lists,
+        dnl strip out any that don't start '^/usr'.
+        SEARCH_LIB=`for x in $SEARCH_LIB; do echo $x; done | sed -ne "s|^/usr|$cross_root|p"`
+        SEARCH_INCLUDE=`for x in $SEARCH_INCLUDE; do echo $x; done | sed -ne "s|^/usr|$cross_root|p"`
+
+        dnl also have pkg-config search for *.pc files under this 'root'
+        if test -z "$PKG_CONFIG_PATH"; then
+            PKG_CONFIG_PATH="$cross_root/local/lib/pkgconfig:$cross_root/lib/pkgconfig"
+            export PKG_CONFIG_PATH
+        fi
+
+        dnl AC_PATH_XTRA doesn't work currently unless -x-includes and
+        dnl -x-libraries are given on the command line. So if they are not
+        dnl set then set them here to plausible defaults.
+        if test -z "$x_includes" -o "$x_includes" = NONE; then
+            WX_PATH_FIND_INCLUDES($SEARCH_INCLUDE, X11/Intrinsic.h)
+            x_includes=$ac_find_includes
+        fi
+        if test -z "$x_libraries" -o "$x_libraries" = NONE; then
+            WX_PATH_FIND_LIBRARIES($SEARCH_LIB, Xt)
+            x_libraries=$ac_find_libraries
+        fi
+    fi
+fi
+
 dnl ------------------------------------------------------------------------
 dnl Check for libraries
 dnl ------------------------------------------------------------------------
@@ -6693,13 +6728,76 @@ if test "$wxUSE_OMF" = "yes"; then
     esac
 fi
 
+dnl According to Vaclav, if NO_GCC_PRAGMA is used for any reason it needs to
+dnl be in wx-config output.  Not doing so could result in link problems.
+GCC_PRAGMA_FLAGS=""
+PCH_FLAGS=""
+
+dnl Find out if we have to define WX_PRECOMP (and thus NO_GCC_PRAGMA)
 if test $GCC_PCH = 1 ; then
-    CPPFLAGS="-DWX_PRECOMP $CPPFLAGS"
+    PCH_FLAGS="-DWX_PRECOMP"
+    GCC_PRAGMA_FLAGS="-DNO_GCC_PRAGMA"
+else
+    dnl Find out if we have to define NO_GCC_PRAGMA
+    if test "$GCC" = yes; then
+        AC_MSG_CHECKING([if this GCC version is >= 4.0 and needs -DNO_GCC_PRAGMA])
+        AC_TRY_COMPILE([],
+            [#if (__GNUC__ < 4)
+             #error "Not GCC 4.0 or greater"
+             #endif
+            ],
+            [GCC_PRAGMA_FLAGS="-DNO_GCC_PRAGMA"
+             AC_MSG_RESULT([yes])],
+            [AC_MSG_RESULT([no])
+            case "${host}" in
+                powerpc-*-darwin* )
+                    dnl Some Apple's GCC version are broken and can't handle the
+                    dnl pragmas:
+                    GCC_PRAGMA_FLAGS="-DNO_GCC_PRAGMA"
+                ;;
+                *-*-mingw32* )
+                    dnl MinGW GCC versions > 3.2 have problems with
+                    dnl static member of classes derived from templates
+                    dnl in combination with #pragma interface/implementation
+                    dnl (the test case uses 4 files)
+                    dnl ... and with exceptions handling (undefined symbols needed
+                    dnl to correctly calls dtors when unwinding) as well
+                    if test "$wxUSE_STL" = "yes" -o \
+                    "$wxUSE_NO_EXCEPTIONS" != "yes" -o \
+                    "$wxUSE_NO_RTTI" != "yes"; then
+                        AC_MSG_CHECKING([if this MinGW version needs -DNO_GCC_PRAGMA])
+                        AC_TRY_COMPILE([],
+                            [#if !(__GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 2))
+                             #error "Not GCC 3.2 or greater"
+                             #endif
+                            ],
+                            [GCC_PRAGMA_FLAGS="-DNO_GCC_PRAGMA"
+                             AC_MSG_RESULT([yes])],
+                            [AC_MSG_RESULT([no])])
+                    fi
+                    ;;
+                *-pc-os2_emx | *-pc-os2-emx )
+                    dnl GCC versions ported to OS/2 have similar problems with
+                    dnl static member of classes in combination with STL and
+                    dnl pragma interface/implementation
+                    if test "$wxUSE_STL" = "yes"; then
+                        AC_MSG_CHECKING([if this gcc version needs -DNO_GCC_PRAGMA])
+                        AC_TRY_COMPILE([],
+                            [#if !(__GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 2))
+                             #error "Not GCC 3.2 or greater"
+                             #endif
+                            ],
+                            [GCC_PRAGMA_FLAGS="-DNO_GCC_PRAGMA"
+                             AC_MSG_RESULT([yes])],
+                            [AC_MSG_RESULT([no])])
+                    fi
+                    ;;
+            esac
+dnl  closing bracket of if GCC < 4.0
+        ] ) 
+    fi
 fi
-
-dnl FIXME: This is a temporary measure until the need for it is also
-dnl        removed from the headers.
-CPPFLAGS="-DNO_GCC_PRAGMA $CPPFLAGS"
+CPPFLAGS="$PCH_FLAGS $GCC_PRAGMA_FLAGS $CPPFLAGS"
 
 
 dnl for convenience, sort the samples in alphabetical order
@@ -6750,6 +6848,7 @@ AC_SUBST(WXCONFIG_INCLUDE)
 AC_SUBST(WXCONFIG_RPATH)
 AC_SUBST(WXCONFIG_LDFLAGS_GUI)
 AC_SUBST(WX_LARGEFILE_FLAGS)
+AC_SUBST(GCC_PRAGMA_FLAGS)
 AC_SUBST(CODE_GEN_FLAGS)
 AC_SUBST(CODE_GEN_FLAGS_CXX)
 AC_SUBST(EXE_LINKER)