> On Jul 16, 2015, at 11:45 AM, Martin Jansa <martin.ja...@gmail.com> wrote:
> 
> On Thu, Jul 16, 2015 at 11:12:04AM -0400, Drew Moseley wrote:
>> The existing test for GLU support is backwards.  Reverse the
>> sense of the conditional when built with "--enable-glu".
>> 
>> Signed-off-by: Drew Moseley <drew_mose...@mentor.com 
>> <mailto:drew_mose...@mentor.com>>
>> ---
>> ...figure-Allow-to-disable-demos-which-require-GLEW-.patch | 14 
>> ++++++++------
>> 1 file changed, 8 insertions(+), 6 deletions(-)
>> 
>> diff --git 
>> a/meta/recipes-graphics/mesa/mesa-demos/0003-configure-Allow-to-disable-demos-which-require-GLEW-.patch
>>  
>> b/meta/recipes-graphics/mesa/mesa-demos/0003-configure-Allow-to-disable-demos-which-require-GLEW-.patch
>> index 4b07193..b25f5ce 100644
>> --- 
>> a/meta/recipes-graphics/mesa/mesa-demos/0003-configure-Allow-to-disable-demos-which-require-GLEW-.patch
>> +++ 
>> b/meta/recipes-graphics/mesa/mesa-demos/0003-configure-Allow-to-disable-demos-which-require-GLEW-.patch
>> @@ -10,20 +10,21 @@ Subject: [PATCH 3/9] configure: Allow to disable demos 
>> which require GLEW or
>> Upstream-Status: Pending
>> 
>> Signed-off-by: Martin Jansa <martin.ja...@gmail.com 
>> <mailto:martin.ja...@gmail.com>>
>> +Signed-off-by: Drew Moseley <drew_mose...@mentor.com 
>> <mailto:drew_mose...@mentor.com>>
>> ---
>> - configure.ac                  | 49 ++++++++++++++++++++---------
>> - src/Makefile.am               | 14 ++++++---
>> + configure.ac                  | 50 ++++++++++++++++++++---------
>> + src/Makefile.am               | 18 ++++++++---
>>  src/demos/Makefile.am         | 73 
>> ++++++++++++++++++++++++-------------------
>>  src/egl/Makefile.am           |  8 +++--
>>  src/egl/opengles1/Makefile.am | 44 +++++++++++++++-----------
>>  src/egl/opengles2/Makefile.am | 33 ++++++++++---------
>> - 6 files changed, 135 insertions(+), 86 deletions(-)
>> + 6 files changed, 140 insertions(+), 86 deletions(-)
>> 
>> diff --git a/configure.ac b/configure.ac
>> index 9445424..bc4c8d1 100644
>> --- a/configure.ac
>> +++ b/configure.ac
>> -@@ -93,25 +93,44 @@ AC_EGREP_HEADER([glutInitContextProfile],
>> +@@ -89,25 +89,45 @@ AC_EGREP_HEADER([glutInitContextProfile],
>>              [AC_DEFINE(HAVE_FREEGLUT)],
>>              [])
>> 
>> @@ -66,7 +67,7 @@ index 9445424..bc4c8d1 100644
>> -DEMO_CFLAGS="$DEMO_CFLAGS $GLU_CFLAGS"
>> -DEMO_LIBS="$DEMO_LIBS $GLU_LIBS"
>> +if test "x$enable_glu" = xyes; then
>> -+    PKG_CHECK_MODULES(GLU, [glu], [],
>> ++    PKG_CHECK_MODULES(GLU, [glu],
> 
> Are you sure? It was like this in original PKG_CHECK_MODULES and I think
> it was correct. 4th parameter is used as fallback to find it manually
> when pkg-config doesn't find it, with your change it would use
> AC_CHECK_HEADER and ignore the values set returned by pkg-config.


Hi Martin,

I’m fairly certain this is needed however I’m not terribly familiar with 
autotools so it’s possible I missed something.  I know that without this change 
a number of the demo apps I expect do not get built.  It’s been a while since I 
looked but I seem to recall that the “geartrain” demo among others will not be 
available without this change.

From my reading of the PKG_CHECK_MODULES docs at 
https://autotools.io/pkgconfig/pkg_check_modules.html 
<https://autotools.io/pkgconfig/pkg_check_modules.html>, it seems the 3rd 
parameter is the action-if-found and my read of the logic here is that if glu 
is found it then verifies the presence of the header files and libs.

I’ll kick off a fresh build and dig around a bit just in case I missed 
something.

Regards,

Drew

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