[ft-devel] Re: autoconf-based cross-building patch ([ft] FT2 Cross-compile Error)

[Parr, Aaron]

Hi there,

Sorry to resurrect an ancient thread, but I ran into a similar problem when attempting to cross-compile freetype2 v2.4.6 using LTIB.

In the hopes of saving someone else the trouble, I’m including my solution in the form of the attached patch which explains the problem and shows my hacky fix to allow it to build under LTIB.

 

-Aaron

 

# 2011-Nov-07

# This patch provides a workaround for config problems caused by LTIB's env setup.

# In a nutshell, two issues were occurring:

# 1) Freetype2's configure script was ignoring --build=XXX options and guessing the wrong compiler triplet for the build machine when called in LTIB environment

#   FIX: remove call to builds/unix/config.guess in favor of '/usr/bin/gcc -dumpmachine'

# 2) The [triplet]-gcc file was adding some command switchs and somehow using the path to find "the true gcc" when compiling. Since the LTIB environment places its own spoof dirs first in the path, [triplet]-gcc wound up calling the cross compiler.

#   FIX: modify the variable holding the native compiler call (CC_BUILD) to set the environment to something resonable when using [triplet]-gcc as determined by the above fix. (env PATH=/usr/bin XXX)

# Note that the problem is caused by bad env settings -- using the configure to set up a "proper" no-spoof cross-compile works fine.

 

diff -uNr freetype-2.4.6/builds/unix/configure freetype-2.4.6-modified//builds/unix/configure

--- freetype-2.4.6/builds/unix/configure               2011-07-29 00:39:28.000000000 -0400

+++ freetype-2.4.6-modified//builds/unix/configure      2011-11-07 14:49:43.138435856 -0500

@@ -2457,18 +2457,19 @@

 

 { $as_echo "$as_me:${as_lineno-$LINENO}: checking build system type" >&5

 $as_echo_n "checking build system type... " >&6; }

-if ${ac_cv_build+:} false; then :

-  $as_echo_n "(cached) " >&6

-else

-  ac_build_alias=$build_alias

-test "x$ac_build_alias" = x &&

-  ac_build_alias=`$SHELL "$ac_aux_dir/config.guess"`

-test "x$ac_build_alias" = x &&

-  as_fn_error $? "cannot guess build type; you must specify one" "$LINENO" 5

-ac_cv_build=`$SHELL "$ac_aux_dir/config.sub" $ac_build_alias` ||

-  as_fn_error $? "$SHELL $ac_aux_dir/config.sub $ac_build_alias failed" "$LINENO" 5

-

-fi

+#if ${ac_cv_build+:} false; then :

+#  $as_echo_n "(cached) " >&6

+#else

+#  ac_build_alias=$build_alias

+#test "x$ac_build_alias" = x &&

+#  ac_build_alias=`$SHELL "$ac_aux_dir/config.guess"`

+#test "x$ac_build_alias" = x &&

+#  as_fn_error $? "cannot guess build type; you must specify one" "$LINENO" 5

+#ac_cv_build=`$SHELL "$ac_aux_dir/config.sub" $ac_build_alias` ||

+#  as_fn_error $? "$SHELL $ac_aux_dir/config.sub $ac_build_alias failed" "$LINENO" 5#

+#

+#fi

+ac_cv_build=`/usr/bin/gcc -dumpmachine`

 { $as_echo "$as_me:${as_lineno-$LINENO}: result: $ac_cv_build" >&5

 $as_echo "$ac_cv_build" >&6; }

 case $ac_cv_build in

@@ -3577,7 +3578,7 @@

 fi

 fi

 fi

-CC_BUILD=$ac_cv_prog_CC_BUILD

+CC_BUILD="env PATH=/usr/bin $ac_cv_prog_CC_BUILD"

 if test -n "$CC_BUILD"; then

   { $as_echo "$as_me:${as_lineno-$LINENO}: result: $CC_BUILD" >&5

 $as_echo "$CC_BUILD" >&6; }

@@ -3594,6 +3595,8 @@

   rm -f a.* b.* a_out.exe conftest.*

   echo > conftest.c "int main() { return 0;}"

   ${CC_BUILD} conftest.c || as_fn_error $? "native C compiler is not working" "$LINENO" 5

+  #touch a.out

+  #chmod +x a.out

   rm -f conftest.c

   if test -x a.out -o -x b.out -o -x conftest; then

     EXEEXT_BUILD=""