freerdp: Add support for uClibc

The stable-1.1 branch of freerdp fails to build when using a uClibc
toolchain because it's using functions which are not implemented in
uClibc, like eventfd_read, eventfd_write and futimes. That is causing
build failures like these ones:

../../libwinpr/synch/libwinpr-synch.so.0.1.0: undefined reference to
`eventfd_read'
../../libwinpr/synch/libwinpr-synch.so.0.1.0: undefined reference to
`eventfd_write'

../../common/libfreerdp-client.so.1.1.0: undefined reference to
`futimes'

Apply an adapted upstream patch to add support for uClibc.

Upstream patch:
  https://github.com/FreeRDP/FreeRDP/commit/5f9c36da5d5cd3c5dce49f7b32fe011cb293f9ec/

Fixes:
  http://autobuild.buildroot.net/results/a66/a66e1ab18cd12904a64afcbf54116ceef889e966/build-end.log

Signed-off-by: Vicente Olivert Riera <Vincent.Riera@imgtec.com>
---
 .../freerdp-0001-add-support-for-uclibc.patch      |   93 ++++++++++++++++++++
 1 files changed, 93 insertions(+), 0 deletions(-)
 create mode 100644 package/freerdp/freerdp-0001-add-support-for-uclibc.patch

Vicente, All,

On 2014-09-24 14:58 +0100, Vicente Olivert Riera spake thusly:
> The stable-1.1 branch of freerdp fails to build when using a uClibc
> toolchain because it's using functions which are not implemented in
> uClibc, like eventfd_read, eventfd_write and futimes. That is causing
> build failures like these ones:
> 
> ../../libwinpr/synch/libwinpr-synch.so.0.1.0: undefined reference to
> `eventfd_read'
> ../../libwinpr/synch/libwinpr-synch.so.0.1.0: undefined reference to
> `eventfd_write'
> 
> ../../common/libfreerdp-client.so.1.1.0: undefined reference to
> `futimes'
> 
> Apply an adapted upstream patch to add support for uClibc.
> 
> Upstream patch:
>   https://github.com/FreeRDP/FreeRDP/commit/5f9c36da5d5cd3c5dce49f7b32fe011cb293f9ec/
> 
> Fixes:
>   http://autobuild.buildroot.net/results/a66/a66e1ab18cd12904a64afcbf54116ceef889e966/build-end.log
> 
> Signed-off-by: Vicente Olivert Riera <Vincent.Riera@imgtec.com>

Sorry for missign this patch before I sent mine, disabling FreeRDP on
uClibc. :-(

So, I'll summarise our discussion on IRC:

  - you reference an upstream commit, but the patch you add to Buildroot
    is not exactly the same

  - that's because it's back-ported from their master, and it is
    touching files that do not exist in the stable-1.1 branch

  - we can't switch to using master, because it is too much in a flux
    for now

Although you say in your commit log "adapted upstream patch", it is not
clear enough (at least for me) what "adapted" means. It could be:
  - re-diffed to adapt to new line numbers
  - tweak name of variables that changed
  - trim non-applicable parts
  - ...

This looks like nit-picking, but it is not obvious, so needs a bit of
extra explanations. Like:

    Backport upstream patch, with non-applicable parts (new files from
    master, but not in the stable-1.1 branch) trimmed down:
        https://github.com/FreeRDP/FreeRDP/commit/5f9c36da5d5cd3c5dce49f7b32fe011cb293f9ec/

Otherwise the commit log is OK, and I'm fine with the change (I'll test
it shortly.)

Again, sorry for the mishap... :-/

Regards,
Yann E. MORIN.

> ---
>  .../freerdp-0001-add-support-for-uclibc.patch      |   93 ++++++++++++++++++++
>  1 files changed, 93 insertions(+), 0 deletions(-)
>  create mode 100644 package/freerdp/freerdp-0001-add-support-for-uclibc.patch
> 
> diff --git a/package/freerdp/freerdp-0001-add-support-for-uclibc.patch b/package/freerdp/freerdp-0001-add-support-for-uclibc.patch
> new file mode 100644
> index 0000000..73f9807
> --- /dev/null
> +++ b/package/freerdp/freerdp-0001-add-support-for-uclibc.patch
> @@ -0,0 +1,93 @@
> +From be615daf41b4bcc61322a987088ee209b5e66c19 Mon Sep 17 00:00:00 2001
> +From: Vicente Olivert Riera <Vincent.Riera@imgtec.com>
> +Date: Wed, 24 Sep 2014 13:54:15 +0100
> +Subject: [PATCH] Add support for uClibc
> +
> +The stable-1.1 branch of freerdp fails to build when using a uClibc
> +toolchain because it's using functions which are not implemented in
> +uClibc, like eventfd_read, eventfd_write and futimes. That is causing
> +build failures like these ones:
> +
> +../../libwinpr/synch/libwinpr-synch.so.0.1.0: undefined reference to
> +`eventfd_read'
> +../../libwinpr/synch/libwinpr-synch.so.0.1.0: undefined reference to
> +`eventfd_write'
> +
> +../../common/libfreerdp-client.so.1.1.0: undefined reference to
> +`futimes'
> +
> +This patch is based on this upstream patch:
> +
> +  https://github.com/FreeRDP/FreeRDP/commit/5f9c36da5d5cd3c5dce49f7b32fe011cb293f9ec/
> +
> +Signed-off-by: Vicente Olivert Riera <Vincent.Riera@imgtec.com>
> +---
> + channels/drive/client/drive_file.c |   12 +++++++++---
> + winpr/libwinpr/synch/event.c       |   14 ++++++++++++++
> + 2 files changed, 23 insertions(+), 3 deletions(-)
> +
> +diff --git a/channels/drive/client/drive_file.c b/channels/drive/client/drive_file.c
> +index 376b4fe..b20f408 100644
> +--- a/channels/drive/client/drive_file.c
> ++++ b/channels/drive/client/drive_file.c
> +@@ -480,7 +480,11 @@ BOOL drive_file_set_information(DRIVE_FILE* file, UINT32 FsInformationClass, UIN
> + 	int status;
> + 	char* fullpath;
> + 	struct STAT st;
> ++#if defined(ANDROID)
> + 	struct timeval tv[2];
> ++#else
> ++	struct timespec tv[2];
> ++#endif
> + 	UINT64 LastWriteTime;
> + 	UINT32 FileAttributes;
> + 	UINT32 FileNameLength;
> +@@ -501,15 +505,17 @@ BOOL drive_file_set_information(DRIVE_FILE* file, UINT32 FsInformationClass, UIN
> + 				return FALSE;
> + 
> + 			tv[0].tv_sec = st.st_atime;
> +-			tv[0].tv_usec = 0;
> + 			tv[1].tv_sec = (LastWriteTime > 0 ? FILE_TIME_RDP_TO_SYSTEM(LastWriteTime) : st.st_mtime);
> +-			tv[1].tv_usec = 0;
> + #ifndef WIN32
> + /* TODO on win32 */                        
> + #ifdef ANDROID
> ++			tv[0].tv_usec = 0;
> ++			tv[1].tv_usec = 0;
> + 			utimes(file->fullpath, tv);
> + #else
> +-			futimes(file->fd, tv);
> ++			tv[0].tv_nsec = 0;
> ++			tv[1].tv_nsec = 0;
> ++			futimens(file->fd, tv);
> + #endif
> + 
> + 			if (FileAttributes > 0)
> +diff --git a/winpr/libwinpr/synch/event.c b/winpr/libwinpr/synch/event.c
> +index 173afaf..943cccb 100644
> +--- a/winpr/libwinpr/synch/event.c
> ++++ b/winpr/libwinpr/synch/event.c
> +@@ -115,6 +115,20 @@ HANDLE OpenEventA(DWORD dwDesiredAccess, BOOL bInheritHandle, LPCSTR lpName)
> + 	return NULL;
> + }
> + 
> ++#ifdef HAVE_EVENTFD_H
> ++#if defined(__UCLIBC__)
> ++static int eventfd_read(int fd, eventfd_t* value)
> ++{
> ++	return (read(fd, value, sizeof(*value)) == sizeof(*value)) ? 0 : -1;
> ++}
> ++
> ++static int eventfd_write(int fd, eventfd_t value)
> ++{
> ++	return (write(fd, &value, sizeof(value)) == sizeof(value)) ? 0 : -1;
> ++}
> ++#endif
> ++#endif
> ++
> + BOOL SetEvent(HANDLE hEvent)
> + {
> + 	ULONG Type;
> +-- 
> +1.7.1
> +
> -- 
> 1.7.1
> 
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