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configure: Check for libfdt version 1.4.0

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Some recent patches require a function from libfdt version 1.4.0,
so we should check for this version during the configure step
already. Unfortunately, there does not seem to be a proper #define
for the version number in the libfdt headers. So alternatively,
we check for the availability of the required function
fdt_get_property_by_offset() instead instead.

Signed-off-by: Thomas Huth <thuth@redhat.com>
Signed-off-by: Alexander Graf <agraf@suse.de>
This commit is contained in:
Thomas Huth 2015-05-18 12:59:49 +02:00 committed by Alexander Graf
parent 28f490b24a
commit 31ce0adb79
1 changed files with 4 additions and 2 deletions
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6
configure vendored
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@ -3115,9 +3115,11 @@ fi
if test "$fdt" != "no" ; then
fdt_libs="-lfdt"
# explicitly check for libfdt_env.h as it is missing in some stable installs
# and test for required functions to make sure we are on a version >= 1.4.0
cat > $TMPC << EOF
#include <libfdt.h>
#include <libfdt_env.h>
int main(void) { return 0; }
int main(void) { fdt_get_property_by_offset(0, 0, 0); return 0; }
EOF
if compile_prog "" "$fdt_libs" ; then
# system DTC is good - use it
@ -3135,7 +3137,7 @@ EOF
fdt_libs="-L\$(BUILD_DIR)/dtc/libfdt $fdt_libs"
elif test "$fdt" = "yes" ; then
# have neither and want - prompt for system/submodule install
error_exit "DTC (libfdt) not present. Your options:" \
error_exit "DTC (libfdt) version >= 1.4.0 not present. Your options:" \
" (1) Preferred: Install the DTC (libfdt) devel package" \
" (2) Fetch the DTC submodule, using:" \
" git submodule update --init dtc"