more support for mingw (just give the "host" at configure-time)

svn path=/trunk/externals/iem/iemmatrix/; revision=3151

2 files changed, 55 insertions, 9 deletions

diff --git a/INSTALL.txt b/INSTALL.txt
index de8f2eb..568389e 100644
--- a/INSTALL.txt
+++ b/INSTALL.txt
@@ -18,17 +18,10 @@ Installation/Compilation instructions for "iemmatrix"
 
 CrossCompilation for w32 with MinGW (http://www.mingw.org) on linux-systems
 	you need a cross-compilation tool-chain for windows (there is a debian-package mingw32)
-	set the CC-environment-variable to the cross-compiler and export it
-	set the STRIP-environment-variable to the strip-version that comes with the toolchain and export it
-	set the CFLAGS-environment-variable to "-mms-bitfields" and export it (this is highly necessary to
-	run the external if pd was compiled with M$-vc)
 	run "./configure" and specify the path to your "m_pd.h" (with --includedir) and to your "pd.lib" (with --libdir)
 	don't forget to override the default extension ("pd_linux" on linux-systems) with the more appropriate "dll".
 	on bash this looks like:
-	 % export CC=i586-mingw32msvc-cc
-	 % export STRIP=i586-mingw32msvc-strip	
-	 % export CFLAGS=-mms-bitfields
-	 % ./configure --includedir=/path/to/w32-pd/src/ -libdir=/path/to/w32-pd/bin/ -with-extension=dll
+	 % ./configure  --with-extension=dll --host=i586-mingw32msvc --includedir=/path/to/w32-pd/src/ -libdir=/path/to/w32-pd/bin/
 	now run "make" and enjoy.
 	
 	
diff --git a/src/configure.ac b/src/configure.ac
index 45fb377..97ce924 100644
--- a/src/configure.ac
+++ b/src/configure.ac
@@ -64,9 +64,62 @@ dnl Checks for library functions.
 AC_FUNC_MMAP
 AC_CHECK_FUNCS(select socket strerror)
 
+dnl check for "-mms-bitfields" cflag
+dnl why is there no generic compiler-check for a given flag ?
+dnl it would make things so easy: AC_CHECK_FLAG([-mms-bitfields],,)
+AC_MSG_CHECKING("ms-bitfields")
+cat > conftest.c << EOF
+int main(){
+  return 0;
+}
+EOF
+if ${CC} ${INCLUDES} ${DFLAGS} -o conftest.o conftest.c ${CFLAGS} -mms-bitfields > /dev/null 2>&1
+then
+  echo "yes"
+  CFLAGS="${CFLAGS} -mms-bitfields"
+else
+  echo "no"
+fi
+
+
+
 
+dnl isn't there a better way to check for good linker/stripper ?
+
+dnl if we don't have $LD set, we set it to $(CC)
+dnl LD=${LD:=$CC}
+if test "x$LD" = "x"
+then
+ if test "x$host" != "x"
+ then
+  LD=${host}-ld
+  if $(which ${LD} > /dev/null)
+  then
+    :
+  else
+    LD=""
+  fi
+ fi
+fi
 LD=${LD:=$CC}
-STRIP=${STRIP:=strip}
+
+dnl if we don't have $STRIP set, we set it to ${host}-strip or strip
+if test "x$STRIP" = "x"
+then
+ if test "x$host" != "x"
+ then
+  STRIP=${host}-strip
+  if $(which ${host}-strip > /dev/null)
+  then
+    :
+  else
+    STRIP="echo fake strip"
+  fi
+ else
+  STRIP=strip
+ fi
+fi
+dnl STRIP=${STRIP:=strip}
 
 DFLAGS=""