[Buildroot] [PATCH] rauc: add patch to make it build with Linux < 3.0

[Yann E. MORIN <yann.morin.1998@free.fr>]

Thomas, All,

On 2018-08-24 14:35 +0200, Thomas Petazzoni spake thusly:
> This commit adds a patch to RAUC that makes the eMMC boot partition
> support optional. This allows RAUC to build successfully on systems
> using Linux < 3.0.

In your haste in proving me wrong with this emmc in rauc issue, you
forgot a very important and crucial point: you are touching configure.ac
with this patch, so you need RAUC_AUTORECONF = YES . ;-)

Sarcasm aside, with the above fixed:

    Reviewed-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
    Tested-by: "Yann E. MORIN" <yann.morin.1998@free.fr>

To test this, apart the autoreconf change, I also removed that
looked-for header from my system, to be sure to have the test fail.

Regards,
Yann E. MORIN.

> Fixes:
> 
>   http://autobuild.buildroot.net/results/7e1cbeb458cb6536a36eae0d24cefb36edb22f55/
> 
> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
> ---
>  ...make-eMMC-boot-partition-support-optional.patch | 116 +++++++++++++++++++++
>  1 file changed, 116 insertions(+)
>  create mode 100644 package/rauc/0002-build-make-eMMC-boot-partition-support-optional.patch
> 
> diff --git a/package/rauc/0002-build-make-eMMC-boot-partition-support-optional.patch b/package/rauc/0002-build-make-eMMC-boot-partition-support-optional.patch
> new file mode 100644
> index 0000000000..f6177c9d54
> --- /dev/null
> +++ b/package/rauc/0002-build-make-eMMC-boot-partition-support-optional.patch
> @@ -0,0 +1,116 @@
> +From d66502532fea652d8743bfb61f9843c796d305cf Mon Sep 17 00:00:00 2001
> +From: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
> +Date: Fri, 24 Aug 2018 14:30:19 +0200
> +Subject: [PATCH] build: make eMMC boot partition support optional
> +
> +The eMMC boot partition support, added in commit
> +ea5cc7ff606c65536da218bd1ef6d0ca279c9b17 ("src/update_handler: add
> +support for updating eMMC boot partitions"), requires
> +<linux/mmc/ioctl.h>, only available starting from kernel headers 3.0.
> +
> +Even though it is pretty likely that people are going to use Linux >=
> +3.0 on their embedded systems these days, RAUC also needs to be built
> +natively on the build machine to produce update artifacts, and the
> +build machine is sometimes using an ancient Linux system, especially
> +in an enterprise contexts.
> +
> +In order to make sure that RAUC builds fine in this context, this
> +commit makes the eMMC boot partition support optional, by verifying
> +the availability of <linux/mmc/ioctl.h>.
> +
> +Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
> +---
> + Makefile.am          | 5 ++++-
> + configure.ac         | 6 ++++++
> + src/update_handler.c | 6 ++++++
> + 3 files changed, 16 insertions(+), 1 deletion(-)
> +
> +diff --git a/Makefile.am b/Makefile.am
> +index 23eb2d1..7b4682d 100644
> +--- a/Makefile.am
> ++++ b/Makefile.am
> +@@ -39,7 +39,6 @@ librauc_la_SOURCES = \
> + 	src/checksum.c \
> + 	src/config_file.c \
> + 	src/context.c \
> +-	src/emmc.c \
> + 	src/install.c \
> + 	src/manifest.c \
> + 	src/mark.c \
> +@@ -63,6 +62,10 @@ librauc_la_SOURCES = \
> + 	include/update_handler.h \
> + 	include/utils.h
> + 
> ++if WANT_EMMC_BOOT_SUPPORT
> ++librauc_la_SOURCES += src/emmc.c
> ++endif
> ++
> + if WANT_NETWORK
> + librauc_la_SOURCES += src/network.c include/network.h
> + endif
> +diff --git a/configure.ac b/configure.ac
> +index 2d6f940..1ec124b 100644
> +--- a/configure.ac
> ++++ b/configure.ac
> +@@ -102,6 +102,12 @@ AC_SUBST(DBUS_SYSTEMSERVICEDIR)
> + 
> + # Checks for header files.
> + 
> ++AC_CHECK_HEADER([linux/mmc/ioctl.h],
> ++	AC_DEFINE([ENABLE_EMMC_BOOT_SUPPORT], [1], [Define to 1 to enable eMMC boot support]),
> ++	AC_DEFINE([ENABLE_EMMC_BOOT_SUPPORT], [0]))
> ++
> ++AM_CONDITIONAL([WANT_EMMC_BOOT_SUPPORT], [test x$ac_cv_header_linux_mmc_ioctl_h != xno])
> ++
> + # Checks for typedefs, structures, and compiler characteristics.
> + 
> + # Checks for library functions.
> +diff --git a/src/update_handler.c b/src/update_handler.c
> +index 62115ec..a9f233a 100644
> +--- a/src/update_handler.c
> ++++ b/src/update_handler.c
> +@@ -57,6 +57,7 @@ out:
> + 	return outstream;
> + }
> + 
> ++#if ENABLE_EMMC_BOOT_SUPPORT == 1
> + static gboolean clear_slot(RaucSlot *slot, GError **error)
> + {
> + 	GError *ierror = NULL;
> +@@ -99,6 +100,7 @@ out:
> + 	g_clear_object(&outstream);
> + 	return res;
> + }
> ++#endif
> + 
> + static gboolean ubifs_ioctl(RaucImage *image, int fd, GError **error)
> + {
> +@@ -1085,6 +1087,7 @@ out:
> + 	return res;
> + }
> + 
> ++#if ENABLE_EMMC_BOOT_SUPPORT == 1
> + static gboolean img_to_boot_emmc_handler(RaucImage *image, RaucSlot *dest_slot, const gchar *hook_name, GError **error)
> + {
> + 
> +@@ -1245,6 +1248,7 @@ out:
> + 
> + 	return res;
> + }
> ++#endif
> + 
> + static gboolean img_to_raw_handler(RaucImage *image, RaucSlot *dest_slot, const gchar *hook_name, GError **error)
> + {
> +@@ -1329,7 +1333,9 @@ RaucUpdatePair updatepairs[] = {
> + 	{"*.img", "nand", img_to_nand_handler},
> + 	{"*.img", "ubivol", img_to_ubivol_handler},
> + 	{"*.squashfs", "ubivol", img_to_ubivol_handler},
> ++#if ENABLE_EMMC_BOOT_SUPPORT == 1
> + 	{"*.img", "boot-emmc", img_to_boot_emmc_handler},
> ++#endif
> + 	{"*.img", "*", img_to_raw_handler}, /* fallback */
> + 	{0}
> + };
> +-- 
> +2.14.4
> +
> -- 
> 2.14.4
> 

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