[PATCH 0/2] Two small ./configure fixes

[PATCH 0/2] Two small ./configure fixes

[Stefan Hajnoczi]

My hopes of cross-compiling fio for Windows were dashed when I realized
pthreads is needed (I guess only Cygwin supports it, not mingw).

On the plus side, here are two small fixes for ./configure.

Stefan Hajnoczi (2):
  Honor ./configure --cc= option
  Detect Windows operating system in ./configure

 configure | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

-- 
1.8.5.3

[PATCH 1/2] Honor ./configure --cc= option

[Stefan Hajnoczi]

The cc variable is assigned before parsing command-line options.  This
effectively ignores the ./configure --cc= option.  Move the cc variable
assigned below option parsing.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
 configure | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/configure b/configure
index 4a8d352..7b1d79a 100755
--- a/configure
+++ b/configure
@@ -130,9 +130,6 @@ output_sym() {
 targetos=""
 cpu=""
 
-cross_prefix=${cross_prefix-${CROSS_COMPILE}}
-cc="${CC-${cross_prefix}gcc}"
-
 # default options
 show_help="no"
 exit_val=0
@@ -175,6 +172,9 @@ if test "$show_help" = "yes" ; then
   exit $exit_val
 fi
 
+cross_prefix=${cross_prefix-${CROSS_COMPILE}}
+cc="${CC-${cross_prefix}gcc}"
+
 if check_define __ANDROID__ ; then
   targetos="Android"
 elif check_define __linux__ ; then
-- 
1.8.5.3

[PATCH 2/2] Detect Windows operating system in ./configure

[Stefan Hajnoczi]

We should not rely on `uname -s` if we ever want cross-compiling to
work, so detect _WIN32.

Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
---
 configure | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/configure b/configure
index 7b1d79a..63aa02d 100755
--- a/configure
+++ b/configure
@@ -184,6 +184,8 @@ elif check_define __OpenBSD__ ; then
 elif check_define __sun__ ; then
   targetos='SunOS'
   CFLAGS="$CFLAGS -D_REENTRANT"
+elif check_define _WIN32 ; then
+  targetos='CYGWIN'
 else
   targetos=`uname -s`
 fi
-- 
1.8.5.3

Re: [PATCH 0/2] Two small ./configure fixes

[Sitsofe Wheeler]

On Thu, Mar 06, 2014 at 06:41:57PM +0100, Stefan Hajnoczi wrote:
> My hopes of cross-compiling fio for Windows were dashed when I realized
> pthreads is needed (I guess only Cygwin supports it, not mingw).

I think mingw supports pthreads using winpthreads (see
http://thread.gmane.org/gmane.comp.storage.fio/97/focus=149 ). Does fio
even compile with pure cygwin gcc (rather than mingw)? I think I had a
brief try and it complained about conflicting headers...

-- 
Sitsofe | http://sucs.org/~sits/

Re: [PATCH 0/2] Two small ./configure fixes

[Jens Axboe]

On 03/06/2014 11:14 AM, Sitsofe Wheeler wrote:
> On Thu, Mar 06, 2014 at 06:41:57PM +0100, Stefan Hajnoczi wrote:
>> My hopes of cross-compiling fio for Windows were dashed when I realized
>> pthreads is needed (I guess only Cygwin supports it, not mingw).
>
> I think mingw supports pthreads using winpthreads (see
> https://urldefense.proofpoint.com/v1/url?u=http://thread.gmane.org/gmane.comp.storage.fio/97/focus%3D149&k=ZVNjlDMF0FElm4dQtryO4A%3D%3D%0A&r=3JMVyziIyZtZ5cv9eWNLwQ%3D%3D%0A&m=UhTi1rWRqSE0ZT%2B5li5HCwkSWuK8mUG1CqLBrQTtHU0%3D%0A&s=28594f27ce732489c3620148921f10705aa70e811eeaf337622bc397dae3f21d ). Does fio
> even compile with pure cygwin gcc (rather than mingw)? I think I had a
> brief try and it complained about conflicting headers...

Probably want to pull Bruce into this thread.

-- 
Jens Axboe

RE: [PATCH 0/2] Two small ./configure fixes

[Bruce Cran]

The Windows build of fio assumes only a minimal set of POSIX headers is available, so trying to build using Cygwin's GCC and its full set is probably not going to work. Why do you not want to use MinGW GCC?

-- 
Bruce

-----Original Message-----
From: Jens Axboe [mailto:axboe@fb.com] 
Sent: Thursday, March 6, 2014 2:20 PM
To: Sitsofe Wheeler; Stefan Hajnoczi
Cc: fio@vger.kernel.org; Bruce Cran
Subject: Re: [PATCH 0/2] Two small ./configure fixes

On 03/06/2014 11:14 AM, Sitsofe Wheeler wrote:
> On Thu, Mar 06, 2014 at 06:41:57PM +0100, Stefan Hajnoczi wrote:
>> My hopes of cross-compiling fio for Windows were dashed when I 
>> realized pthreads is needed (I guess only Cygwin supports it, not mingw).
>
> I think mingw supports pthreads using winpthreads (see 
> https://urldefense.proofpoint.com/v1/url?u=http://thread.gmane.org/gma
> ne.comp.storage.fio/97/focus%3D149&k=ZVNjlDMF0FElm4dQtryO4A%3D%3D%0A&r
> =3JMVyziIyZtZ5cv9eWNLwQ%3D%3D%0A&m=UhTi1rWRqSE0ZT%2B5li5HCwkSWuK8mUG1CqLBrQTtHU0%3D%0A&s=28594f27ce732489c3620148921f10705aa70e811eeaf337622bc397dae3f21d ). Does fio even compile with pure cygwin gcc (rather than mingw)? I think I had a brief try and it complained about conflicting headers...

Probably want to pull Bruce into this thread.

--
Jens Axboe



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Re: [PATCH 0/2] Two small ./configure fixes

[Stefan Hajnoczi]

On Thu, Mar 06, 2014 at 09:22:30PM +0000, Bruce Cran wrote:
> The Windows build of fio assumes only a minimal set of POSIX headers is available, so trying to build using Cygwin's GCC and its full set is probably not going to work. Why do you not want to use MinGW GCC?

I want to cross-compile using mingw, just wasn't aware of winpthreads.
Not sure if anyone actually wants to use Cygwin :-).

Stefan

Re: [PATCH 0/2] Two small ./configure fixes

[Jens Axboe]

On 03/06/2014 10:41 AM, Stefan Hajnoczi wrote:
> My hopes of cross-compiling fio for Windows were dashed when I realized
> pthreads is needed (I guess only Cygwin supports it, not mingw).
>
> On the plus side, here are two small fixes for ./configure.
>
> Stefan Hajnoczi (2):
>    Honor ./configure --cc= option
>    Detect Windows operating system in ./configure

Thanks, applied both.

-- 
Jens Axboe