[Buildroot] iMX6Q prerequisite patches for Qt5

[Buildroot] iMX6Q prerequisite patches for Qt5

[H.Fijnvandraat at inter.nl.net]

Hi All,

I have been successfull in compiling Qt5 for the Freescale iMX6Q processor
using the contributions from Thomas Petazzoni.

However, the iMX6Q uses a closed source Vivante GPU, which must be handled
by some libraries.

The attached patches are an attempt to incorporate these into Buildroot.

Regards,

Henk

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[Buildroot] iMX6Q prerequisite patches for Qt5

[Arnout Vandecappelle]

  Hi Henk,

On 20/04/13 17:26, H.Fijnvandraat at inter.nl.net wrote:
> Hi All,
>
> I have been successfull in compiling Qt5 for the Freescale iMX6Q processor
> using the contributions from Thomas Petazzoni.
>
> However, the iMX6Q uses a closed source Vivante GPU, which must be handled
> by some libraries.
>
> The attached patches are an attempt to incorporate these into Buildroot.

  I had to make changes in Qt5 itself as well to make it work. Didn't you 
need to?


  I also have the following problem with the gpu-viv-bin-mx6q package. 
It's a binary that is linked to a soft-float glibc library.  I had 
already added

         # Library binaries are linked against libc.so.6
         depends on BR2_TOOLCHAIN_CTNG_glibc || \
                 BR2_TOOLCHAIN_CTNG_eglibc || \
                 BR2_TOOLCHAIN_EXTERNAL_GLIBC

but that doesn't yet capture the softfloat aspect. The alternative is to 
lock it on to a specific external toolchain version, but I don't like to 
take away so much freedom from the user (plus it's really annoying when 
deprecating old toolchains).


  Finally, also some comments on the patch submitting process.

- Please send patches in-line, with a single patch per e-mail. That makes 
it easy to make reviews per e-mail. The preferred way of sending patches 
is to use git send-email.

- Please make separate patches for adding a new package and for updating 
other packages to make use of it. Also make the version bump of imx-lib a 
separate patch.

- Please word-wrap all lines at 80 columns.


  If you are not going to submit updated versions of your patch, please 
let us know so somebody else can take over (we will make sure your 
authorship information is retained).

  Regards,
  Arnout
-- 
Arnout Vandecappelle                          arnout at mind be
Senior Embedded Software Architect            +32-16-286500
Essensium/Mind                                http://www.mind.be
G.Geenslaan 9, 3001 Leuven, Belgium           BE 872 984 063 RPR Leuven
LinkedIn profile: http://www.linkedin.com/in/arnoutvandecappelle
GPG fingerprint:  7CB5 E4CC 6C2E EFD4 6E3D A754 F963 ECAB 2450 2F1F

[Buildroot] iMX6Q prerequisite patches for Qt5

[H.Fijnvandraat at inter.nl.net]

Hi Arnout,

Op Ma, 22 april, 2013 8:15 am schreef Arnout Vandecappelle:
> Hi Henk,
>
>
> On 20/04/13 17:26, H.Fijnvandraat at inter.nl.net wrote:
>
>> Hi All,
>>
>>
>> I have been successfull in compiling Qt5 for the Freescale iMX6Q
>> processor using the contributions from Thomas Petazzoni.
>>
>> However, the iMX6Q uses a closed source Vivante GPU, which must be
>> handled by some libraries.
>>
>> The attached patches are an attempt to incorporate these into
>> Buildroot.
>>
>
> I had to make changes in Qt5 itself as well to make it work. Didn't you
> need to?
>
>
> I also have the following problem with the gpu-viv-bin-mx6q package.
> It's a binary that is linked to a soft-float glibc library.  I had
> already added
>
> # Library binaries are linked against libc.so.6
> depends on BR2_TOOLCHAIN_CTNG_glibc || \ BR2_TOOLCHAIN_CTNG_eglibc || \
> BR2_TOOLCHAIN_EXTERNAL_GLIBC
>
>
> but that doesn't yet capture the softfloat aspect. The alternative is to
> lock it on to a specific external toolchain version, but I don't like to
> take away so much freedom from the user (plus it's really annoying when
> deprecating old toolchains).
>
>
> Finally, also some comments on the patch submitting process.
>
>
> - Please send patches in-line, with a single patch per e-mail. That makes
>  it easy to make reviews per e-mail. The preferred way of sending patches
>  is to use git send-email.
>
> - Please make separate patches for adding a new package and for updating
> other packages to make use of it. Also make the version bump of imx-lib a
> separate patch.
>
> - Please word-wrap all lines at 80 columns.
>
>
>
> If you are not going to submit updated versions of your patch, please
> let us know so somebody else can take over (we will make sure your
> authorship information is retained).
>
> Regards,
> Arnout

Thanks for your comments on the patch process. Currently I am not familiar
enough with git -after years of svn- to redo the patches in the proper
way.
(I just bought the Git book from O'Reilly book by Loeliger & McCullough)
Besides I copied them to my private email account, because we do not want
to reveal our company name -yet-

So please if somebody else can redo the patches that would be great.

Then, as I indicated, these patches were only prerequisites, which implies
more is needed right?
And yes, closed source GPU stuff is really annoying, especially if it
requires you to build an external toolchain with glib-2.13, for that's
what
Freescales's LTIB used.
But that is exactly what I did: an external crosstool-NG
(I spent 4 weeks trying to do without, but I could not get the stuff to
link properly)
As an aside: the new Qt5-5.0.2-base fails to build on linking errors
(vtable; that is link sequence problems)

To prevent this email from becomming to big I will only inline the
crosstool-NG config I used. I will put the modified Qt5-base.mk in a
seperate email.

By the way, I used the Freescale Linux distro, which revealed a problem
in Buildroot also: If a custom kernel tarball is used -possibly only-
together with crosstool-NG, that kernel does not get a make
linux-configure to fetch the headers needed to build the toolchain.
And as noted: the integration with crosstool-NG is not perfect, so the
external tarball location is not filled in.
So here is my toolchain/toolchain-crosstool-ng/crosstool-ng.config-glib

#
# Automatically generated make config: don't edit
# crosstool-NG 1.17.0 Configuration
# Sat Dec  8 12:56:02 2012
#
CT_CONFIGURE_has_xz=y
CT_CONFIGURE_has_svn=y
CT_MODULES=y

#
# Paths and misc options
#

#
# crosstool-NG behavior
#
# CT_OBSOLETE is not set
# CT_EXPERIMENTAL is not set
# CT_DEBUG_CT is not set

#
# Paths
#
CT_LOCAL_TARBALLS_DIR=""
CT_WORK_DIR="${CT_TOP_DIR}/.build"
CT_PREFIX_DIR=""
CT_INSTALL_DIR="${CT_PREFIX_DIR}"
CT_RM_RF_PREFIX_DIR=y
CT_REMOVE_DOCS=y
# CT_INSTALL_DIR_RO is not set
# CT_STRIP_ALL_TOOLCHAIN_EXECUTABLES is not set

#
# Downloading
#
# CT_FORBID_DOWNLOAD is not set
# CT_FORCE_DOWNLOAD is not set
CT_CONNECT_TIMEOUT=10
# CT_ONLY_DOWNLOAD is not set
# CT_USE_MIRROR is not set

#
# Extracting
#
# CT_FORCE_EXTRACT is not set
CT_OVERIDE_CONFIG_GUESS_SUB=y
# CT_ONLY_EXTRACT is not set
CT_PATCH_BUNDLED=y
# CT_PATCH_LOCAL is not set
# CT_PATCH_BUNDLED_LOCAL is not set
# CT_PATCH_LOCAL_BUNDLED is not set
# CT_PATCH_BUNDLED_FALLBACK_LOCAL is not set
# CT_PATCH_LOCAL_FALLBACK_BUNDLED is not set
# CT_PATCH_NONE is not set
CT_PATCH_ORDER="bundled"

#
# Build behavior
#
CT_PARALLEL_JOBS=0
CT_LOAD=0
CT_USE_PIPES=y
CT_EXTRA_FLAGS_FOR_HOST=""
# CT_CONFIG_SHELL_SH is not set
# CT_CONFIG_SHELL_ASH is not set
CT_CONFIG_SHELL_BASH=y
# CT_CONFIG_SHELL_CUSTOM is not set
CT_CONFIG_SHELL="${bash}"

#
# Logging
#
# CT_LOG_ERROR is not set
# CT_LOG_WARN is not set
# CT_LOG_INFO is not set
# CT_LOG_EXTRA is not set
CT_LOG_ALL=y
# CT_LOG_DEBUG is not set
CT_LOG_LEVEL_MAX="ALL"
# CT_LOG_SEE_TOOLS_WARN is not set
CT_LOG_TO_FILE=y
CT_LOG_FILE_COMPRESS=y

#
# Target options
#
CT_ARCH="arm"
CT_ARCH_SUPPORTS_BOTH_MMU=y
CT_ARCH_SUPPORTS_BOTH_ENDIAN=y
CT_ARCH_SUPPORTS_32=y
CT_ARCH_SUPPORTS_WITH_ARCH=y
CT_ARCH_SUPPORTS_WITH_CPU=y
CT_ARCH_SUPPORTS_WITH_TUNE=y
CT_ARCH_SUPPORTS_WITH_FLOAT=y
CT_ARCH_SUPPORTS_WITH_FPU=y
CT_ARCH_SUPPORTS_SOFTFP=y
CT_ARCH_DEFAULT_HAS_MMU=y
CT_ARCH_DEFAULT_LE=y
CT_ARCH_DEFAULT_32=y
CT_ARCH_ARCH="armv7-a"
CT_ARCH_CPU="cortex-a9"
CT_ARCH_TUNE="cortex-a9"
CT_ARCH_FPU="neon"
# CT_ARCH_BE is not set
CT_ARCH_LE=y
CT_ARCH_32=y
CT_ARCH_BITNESS=32
# CT_ARCH_FLOAT_HW is not set
# CT_ARCH_FLOAT_SW is not set
CT_TARGET_CFLAGS=""
CT_TARGET_LDFLAGS=""
# CT_ARCH_alpha is not set
CT_ARCH_arm=y
# CT_ARCH_avr32 is not set
# CT_ARCH_blackfin is not set
# CT_ARCH_mips is not set
# CT_ARCH_powerpc is not set
# CT_ARCH_sh is not set
# CT_ARCH_sparc is not set
# CT_ARCH_x86 is not set
CT_ARCH_alpha_AVAILABLE=y
CT_ARCH_arm_AVAILABLE=y
CT_ARCH_avr32_AVAILABLE=y
CT_ARCH_blackfin_AVAILABLE=y
CT_ARCH_m68k_AVAILABLE=y
CT_ARCH_microblaze_AVAILABLE=y
CT_ARCH_mips_AVAILABLE=y
CT_ARCH_powerpc_AVAILABLE=y
CT_ARCH_s390_AVAILABLE=y
CT_ARCH_sh_AVAILABLE=y
CT_ARCH_sparc_AVAILABLE=y
CT_ARCH_x86_AVAILABLE=y

#
# Generic target options
#
CT_ARCH_USE_MMU=y
CT_ARCH_ENDIAN="little"

#
# Target optimisations
#
# CT_ARCH_FLOAT_SOFTFP is not set
CT_ARCH_FLOAT="soft"

#
# arm other options
#
CT_ARCH_ARM_MODE="arm"
CT_ARCH_ARM_MODE_ARM=y
CT_ARCH_ARM_EABI=y

#
# Toolchain options
#

#
# General toolchain options
#
CT_FORCE_SYSROOT=y
CT_USE_SYSROOT=y
CT_SYSROOT_NAME="sysroot"
CT_SYSROOT_DIR_PREFIX=""
CT_WANTS_STATIC_LINK=n
CT_TOOLCHAIN_PKGVERSION=""
CT_TOOLCHAIN_BUGURL=""

#
# Tuple completion and aliasing
#
CT_TARGET_VENDOR="unknown"
CT_TARGET_ALIAS_SED_EXPR=""
CT_TARGET_ALIAS=""

#
# Toolchain type
#
CT_CROSS=y
CT_TOOLCHAIN_TYPE="cross"

#
# Build system
#
CT_BUILD=""
CT_BUILD_PREFIX=""
CT_BUILD_SUFFIX=""

#
# Misc options
#
# CT_TOOLCHAIN_ENABLE_NLS is not set

#
# Operating System
#
CT_KERNEL_SUPPORTS_SHARED_LIBS=y
CT_KERNEL="linux"
CT_KERNEL_VERSION="3.0.35"
# CT_KERNEL_bare_metal is not set
CT_KERNEL_linux=y
CT_KERNEL_bare_metal_AVAILABLE=y
CT_KERNEL_linux_AVAILABLE=y
# CT_KERNEL_V_3_6_3 is not set
# CT_KERNEL_V_3_6_2 is not set
# CT_KERNEL_V_3_6_1 is not set
# CT_KERNEL_V_3_6 is not set
# CT_KERNEL_V_3_5_7 is not set
# CT_KERNEL_V_3_4_15 is not set
# CT_KERNEL_V_3_3_8 is not set
# CT_KERNEL_V_3_2_32 is not set
# CT_KERNEL_V_3_1_10 is not set
# CT_KERNEL_V_3_0_48 is not set
# CT_KERNEL_V_2_6_39_4 is not set
# CT_KERNEL_V_2_6_38_8 is not set
# CT_KERNEL_V_2_6_37_6 is not set
# CT_KERNEL_V_2_6_36_4 is not set
# CT_KERNEL_V_2_6_33_20 is not set
# CT_KERNEL_V_2_6_32_60 is not set
# CT_KERNEL_V_2_6_31_14 is not set
# CT_KERNEL_V_2_6_27_62 is not set
CT_KERNEL_LINUX_CUSTOM=y
CT_KERNEL_LINUX_CUSTOM_LOCATION="/home/systembuilder/buildroot/output/build/linux-custom"
CT_KERNEL_mingw32_AVAILABLE=y

#
# Common kernel options
#
CT_SHARED_LIBS=y

#
# linux other options
#
CT_KERNEL_LINUX_VERBOSITY_0=y
# CT_KERNEL_LINUX_VERBOSITY_1 is not set
# CT_KERNEL_LINUX_VERBOSITY_2 is not set
CT_KERNEL_LINUX_VERBOSE_LEVEL=0
CT_KERNEL_LINUX_INSTALL_CHECK=n

#
# Binary utilities
#
CT_ARCH_BINFMT_ELF=y

#
# GNU binutils
#
# CT_BINUTILS_V_2_21_1a is not set
CT_BINUTILS_V_2_20_1a=y
# CT_BINUTILS_V_2_19_1a is not set
# CT_BINUTILS_V_2_18a is not set
CT_BINUTILS_VERSION="2.20.1a"
CT_BINUTILS_2_20_or_later=y
CT_BINUTILS_2_19_or_later=y
CT_BINUTILS_2_18_or_later=y
CT_BINUTILS_HAS_HASH_STYLE=y
CT_BINUTILS_GOLD_SUPPORTS_ARCH=y
CT_BINUTILS_HAS_PKGVERSION_BUGURL=y
CT_BINUTILS_FORCE_LD_BFD=y
CT_BINUTILS_LINKER_LD=y
CT_BINUTILS_LINKERS_LIST="ld"
CT_BINUTILS_LINKER_DEFAULT="bfd"
CT_BINUTILS_EXTRA_CONFIG_ARRAY=""
# CT_BINUTILS_FOR_TARGET is not set

#
# C compiler
#
CT_CC="gcc"
CT_CC_VERSION="4.6.2"
CT_CC_gcc=y
# CT_CC_V_4_7_2 is not set
# CT_CC_V_4_6_3 is not set
CT_CC_V_4_6_2=y
# CT_CC_V_4_6_1 is not set
# CT_CC_V_4_6_0 is not set
# CT_CC_V_4_5_3 is not set
# CT_CC_V_4_5_2 is not set
# CT_CC_V_4_5_1 is not set
# CT_CC_V_4_5_0 is not set
# CT_CC_V_4_4_7 is not set
# CT_CC_V_4_4_6 is not set
# CT_CC_V_4_4_5 is not set
# CT_CC_V_4_4_4 is not set
# CT_CC_V_4_4_3 is not set
# CT_CC_V_4_4_2 is not set
# CT_CC_V_4_4_1 is not set
# CT_CC_V_4_4_0 is not set
# CT_CC_V_4_3_6 is not set
# CT_CC_V_4_3_5 is not set
# CT_CC_V_4_3_4 is not set
# CT_CC_V_4_3_3 is not set
# CT_CC_V_4_3_2 is not set
# CT_CC_V_4_3_1 is not set
# CT_CC_V_4_2_4 is not set
# CT_CC_V_4_2_2 is not set
CT_CC_GCC_4_2_or_later=y
CT_CC_GCC_4_3_or_later=y
CT_CC_GCC_4_4_or_later=y
CT_CC_GCC_4_5_or_later=y
CT_CC_GCC_4_6=y
CT_CC_GCC_4_6_or_later=y
CT_CC_GCC_HAS_GRAPHITE=y
CT_CC_GCC_HAS_LTO=y
CT_CC_GCC_HAS_PKGVERSION_BUGURL=y
CT_CC_GCC_HAS_BUILD_ID=y
CT_CC_GCC_USE_GMP_MPFR=y
CT_CC_GCC_USE_PPL_CLOOG=y
CT_CC_GCC_USE_MPC=y
CT_CC_GCC_HAS_LIBQUADMATH=y
# CT_CC_LANG_FORTRAN is not set
CT_CC_SUPPORT_CXX=y
CT_CC_SUPPORT_FORTRAN=y
CT_CC_SUPPORT_JAVA=y
CT_CC_SUPPORT_ADA=y
CT_CC_SUPPORT_OBJC=y
CT_CC_SUPPORT_OBJCXX=y

#
# Additional supported languages:
#
CT_CC_LANG_CXX=y
# CT_CC_LANG_JAVA is not set

#
# gcc other options
#
CT_CC_ENABLE_CXX_FLAGS=""
CT_CC_CORE_EXTRA_CONFIG_ARRAY="--disable-decimal-float"
CT_CC_EXTRA_CONFIG_ARRAY="--disable-decimal-float"
CT_CC_STATIC_LIBSTDCXX=y

#
# Optimisation features
#
CT_CC_GCC_USE_GRAPHITE=y
CT_CC_GCC_USE_LTO=y

#
# Settings for libraries running on target
#
CT_CC_GCC_ENABLE_TARGET_OPTSPACE=y
# CT_CC_GCC_LIBMUDFLAP is not set
# CT_CC_GCC_LIBGOMP is not set
# CT_CC_GCC_LIBSSP is not set
# CT_CC_GCC_LIBQUADMATH is not set

#
# Misc. obscure options.
#
CT_CC_CXA_ATEXIT=y
# CT_CC_GCC_DISABLE_PCH is not set
CT_CC_GCC_SJLJ_EXCEPTIONS=m
CT_CC_GCC_LDBL_128=m
# CT_CC_GCC_BUILD_ID is not set

#
# C-library
#
CT_LIBC="glibc"
CT_LIBC_VERSION="2.13"
# CT_LIBC_eglibc is not set
# CT_LIBC_uClibc is not set
CT_LIBC_glibc=y
CT_LIBC_mingw_AVAILABLE=y
CT_LIBC_eglibc_AVAILABLE=y
CT_LIBC_newlib_AVAILABLE=y
CT_LIBC_uClibc_AVAILABLE=y
CT_LIBC_none_AVAILABLE=y
CT_LIBC_glibc_AVAILABLE=y
# CT_LIBC_GLIBC_V_2_14_1 is not set
# CT_LIBC_GLIBC_V_2_14 is not set
CT_LIBC_GLIBC_V_2_13=y
# CT_LIBC_GLIBC_V_2_12_2 is not set
# CT_LIBC_GLIBC_V_2_12_1 is not set
# CT_LIBC_GLIBC_V_2_11_1 is not set
# CT_LIBC_GLIBC_V_2_11 is not set
# CT_LIBC_GLIBC_V_2_10_1 is not set
# CT_LIBC_GLIBC_V_2_9 is not set
# CT_LIBC_GLIBC_V_2_8 is not set
CT_LIBC_SUPPORT_THREADS_ANY=y
CT_LIBC_SUPPORT_NPTL=y
CT_THREADS="nptl"

#
# Common C library options
#
CT_THREADS_NPTL=y
CT_LIBC_XLDD=y
CT_LIBC_GLIBC_MAY_FORCE_PORTS=y
CT_LIBC_glibc_familly=y
CT_LIBC_GLIBC_EXTRA_CONFIG_ARRAY=""
CT_LIBC_GLIBC_CONFIGPARMS=""
CT_LIBC_GLIBC_EXTRA_CFLAGS=""
CT_LIBC_EXTRA_CC_ARGS=""
# CT_LIBC_DISABLE_VERSIONING is not set
CT_LIBC_OLDEST_ABI=""
CT_LIBC_GLIBC_FORCE_UNWIND=y
CT_LIBC_GLIBC_USE_PORTS=y
CT_LIBC_ADDONS_LIST=""
# CT_LIBC_LOCALES is not set
# CT_LIBC_GLIBC_KERNEL_VERSION_NONE is not set
CT_LIBC_GLIBC_KERNEL_VERSION_AS_HEADERS=y
# CT_LIBC_GLIBC_KERNEL_VERSION_CHOSEN is not set
CT_LIBC_GLIBC_MIN_KERNEL="custom"

#
# glibc other options
#

#
# WARNING !!!
#

#
#   For glibc >= 2.8, it can happen that the tarballs
#

#
#   for the addons are not available for download.
#

#
#   If that happens, bad luck... Try a previous version
#

#
#   or try again later... :-(
#

#
# Debug facilities
#
# CT_DEBUG_dmalloc is not set
# CT_DEBUG_duma is not set
# CT_DEBUG_gdb is not set
# CT_DEBUG_ltrace is not set
# CT_DEBUG_strace is not set

#
# Companion libraries
#
CT_COMPLIBS_NEEDED=y
CT_GMP_NEEDED=y
CT_MPFR_NEEDED=y
CT_PPL_NEEDED=y
CT_CLOOG_NEEDED=y
CT_MPC_NEEDED=y
CT_COMPLIBS=y
CT_GMP=y
CT_MPFR=y
CT_PPL=y
CT_CLOOG=y
CT_MPC=y
# CT_GMP_V_5_0_2 is not set
# CT_GMP_V_5_0_1 is not set
CT_GMP_V_4_3_2=y
# CT_GMP_V_4_3_1 is not set
# CT_GMP_V_4_3_0 is not set
CT_GMP_VERSION="4.3.2"
CT_MPFR_V_3_1_0=y
# CT_MPFR_V_3_0_1 is not set
# CT_MPFR_V_3_0_0 is not set
# CT_MPFR_V_2_4_2 is not set
# CT_MPFR_V_2_4_1 is not set
# CT_MPFR_V_2_4_0 is not set
CT_MPFR_VERSION="3.1.0"
CT_PPL_V_0_11_2=y
# CT_PPL_V_0_11_1 is not set
# CT_PPL_V_0_11 is not set
# CT_PPL_V_0_10_2 is not set
CT_PPL_VERSION="0.11.2"
CT_PPL_0_11=y
CT_PPL_NEEDS_LIBPWL=y
CT_CLOOG_V_0_15_11=y
# CT_CLOOG_V_0_15_10 is not set
# CT_CLOOG_V_0_15_9 is not set
# CT_CLOOG_V_0_15_8 is not set
# CT_CLOOG_V_0_15_7 is not set
# CT_CLOOG_V_0_15_6 is not set
CT_CLOOG_VERSION="0.15.11"
CT_CLOOG_0_15_1x=y
CT_CLOOG_NEEDS_AUTORECONF=y
CT_MPC_V_0_9=y
# CT_MPC_V_0_8_2 is not set
# CT_MPC_V_0_8_1 is not set
# CT_MPC_V_0_7 is not set
CT_MPC_VERSION="0.9"

#
# Companion libraries common options
#
# CT_COMPLIBS_CHECK is not set

[Buildroot] iMX6Q package proposals for Qt5

[H.Fijnvandraat at inter.nl.net]

Hi all again,

With this email I inline the changes I made in package/qt5/qt5base
directory files.

I call them proposals at this moment, as I suspect they can be improved,
by people who have more buildroot inside knowledge.

The changes are a variation on the Raspberry-Pi modifications.

Note that the platform hooks point to the Freescale LTIB device directory
that can already be found in the qt5 source:
mkspecs/devices/linux-imx6-g++/qeglshooks.cpp

(Arnout, both -mfloat-abi=softfp -mfpu=neon are needed for the floating
point, the first seems to indicate the way parameters are transferred, the
second indicates the FPU)

kindly requesting for comments,

Henk



File qt5base-mkspecs-files.patch becomes:

=================================
Add a Buildroot 'device' to ease cross-compilation

Qt5 has a mechanism to support "device" profiles, so that people can
specify the compiler, compiler flags and so on for a specific device.

We leverage this mechanism in the Buildroot packaging of qt5 to
simplify cross-compilation: we have our own "device" definition, which
allows us to easily pass the cross-compiler paths and flags from our
qt5.mk.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>

Index: b/mkspecs/devices/linux-buildroot-g++/qmake.conf
===================================================================
--- /dev/null
+++ b/mkspecs/devices/linux-buildroot-g++/qmake.conf
@@ -0,0 +1,61 @@
+MAKEFILE_GENERATOR      = UNIX
+CONFIG                  += incremental gdb_dwarf_index
+QMAKE_INCREMENTAL_STYLE = sublib
+
+include(../../common/linux.conf)
+include(../../common/gcc-base-unix.conf)
+include(../../common/g++-unix.conf)
+
+load(device_config)
+
+QT_QPA_DEFAULT_PLATFORM = eglfs
+
+BUILDROOT_CROSS_COMPILE =
+BUILDROOT_COMPILER_CFLAGS =
+BUILDROOT_COMPILER_CXXFLAGS =
+BUILDROOT_INCLUDE_PATH =
+BUILDROOT_INCDIR_OPENGL_ES2 =
+BUILDROOT_LIBDIR_OPENGL_ES2 =
+BUILDROOT_LIBS_OPENGL_ES2 =
+BUILDROOT_INCDIR_EGL =
+BUILDROOT_LIBDIR_EGL =
+BUILDROOT_LIBS_EGL =
+BUILDROOT_INCDIR_OPENVG =
+BUILDROOT_LIBDIR_OPENVG =
+BUILDROOT_LIBS_OPENVG =
+
+# modifications to g++.conf
+QMAKE_CC                = $${BUILDROOT_CROSS_COMPILE}gcc
+QMAKE_CXX               = $${BUILDROOT_CROSS_COMPILE}g++
+QMAKE_LINK              = $${QMAKE_CXX}
+QMAKE_LINK_SHLIB        = $${QMAKE_CXX}
+
+# modifications to linux.conf
+QMAKE_AR                = $${BUILDROOT_CROSS_COMPILE}ar cqs
+QMAKE_OBJCOPY           = $${BUILDROOT_CROSS_COMPILE}objcopy
+QMAKE_STRIP             = $${BUILDROOT_CROSS_COMPILE}strip
+
+#modifications to gcc-base.conf
+QMAKE_CFLAGS           += $${BUILDROOT_COMPILER_CFLAGS}
+QMAKE_CXXFLAGS         += $${BUILDROOT_COMPILER_CXXFLAGS}
+QMAKE_CXXFLAGS_RELEASE += -O3
+INCLUDEPATH            += $${BUILDROOT_INCLUDE_PATH}
+
+QMAKE_LIBS             += -lrt -lpthread -ldl
+QMAKE_INCDIR_OPENGL_ES2 = $${BUILDROOT_INCDIR_OPENGL_ES2}
+QMAKE_LIBDIR_OPENGL_ES2 = $${BUILDROOT_LIBDIR_OPENGL_ES2}
+QMAKE_LIBS_OPENGL_ES2   = $${BUILDROOT_LIBS_OPENGL_ES2}
+QMAKE_INCDIR_EGL        = $${BUILDROOT_INCDIR_EGL}
+QMAKE_LIBDIR_EGL        = $${BUILDROOT_LIBDIR_EGL}
+QMAKE_LIBS_EGL          = $${BUILDROOT_LIBS_EGL}
+QMAKE_INCDIR_OPENVG     = $${BUILDROOT_INCDIR_OPENVG}
+QMAKE_LIBDIR_OPENVG     = $${BUILDROOT_LIBDIR_OPENVG}
+QMAKE_LIBS_OPENVG       = $${BUILDROOT_LIBS_OPENVG}
+
+# device specific glue code
+EGLFS_PLATFORM_HOOKS_SOURCES =
+
+# Sanity check
+deviceSanityCheckCompiler()
+
+load(qt_config)
Index: b/mkspecs/devices/linux-buildroot-g++/qplatformdefs.h
===================================================================
--- /dev/null
+++ b/mkspecs/devices/linux-buildroot-g++/qplatformdefs.h
@@ -0,0 +1 @@
+#include "../../linux-g++/qplatformdefs.h"
=================================

and the file qt5base.mk is then

=================================
#############################################################
#
# qt5base
#
#############################################################

QT5BASE_VERSION = $(QT5_VERSION)
QT5BASE_SITE =
http://releases.qt-project.org/qt5/$(QT5BASE_VERSION)/submodules_tar/
QT5BASE_SOURCE = qtbase-opensource-src-$(QT5BASE_VERSION).tar.xz

QT5BASE_DEPENDENCIES = host-pkgconf zlib pcre
QT5BASE_INSTALL_STAGING = YES

# A few comments:
#  * -no-pch to workaround the issue described at
#     http://comments.gmane.org/gmane.comp.lib.qt.devel/5933.
#  * -system-zlib because zlib is mandatory for Qt build, and we
#     want to use the Buildroot packaged zlib
#  * -system-pcre because pcre is mandatory to build Qt, and we
#    want to use the one packaged in Buildroot
QT5BASE_CONFIGURE_OPTS += \
	-optimized-qmake \
	-no-kms \
	-no-cups \
	-no-nis \
	-no-libudev \
	-no-iconv \
	-no-gstreamer \
	-no-gtkstyle \
	-system-zlib \
	-system-pcre \
	-no-pch

ifeq ($(BR2_ENABLE_DEBUG),y)
QT5BASE_CONFIGURE_OPTS += -debug
else
QT5BASE_CONFIGURE_OPTS += -release
endif

ifeq ($(BR2_PREFER_STATIC_LIB),y)
QT5BASE_CONFIGURE_OPTS += -static
else
# We apparently can't build both the shared and static variants of the
# library.
QT5BASE_CONFIGURE_OPTS += -shared
endif

ifeq ($(BR2_LARGEFILE),y)
QT5BASE_CONFIGURE_OPTS += -largefile
else
QT5BASE_CONFIGURE_OPTS += -no-largefile
endif

ifeq ($(BR2_PACKAGE_QT5BASE_LICENSE_APPROVED),y)
QT5BASE_CONFIGURE_OPTS += -opensource -confirm-license
QT5BASE_LICENSE = LGPLv2.1 or GPLv3.0
QT5BASE_LICENSE_FILES = LICENSE.GPL LICENSE.LGPL LGPL_EXCEPTION.txt
else
QT5BASE_LICENSE = Commercial license
QT5BASE_REDISTRIBUTE = NO
endif

# We have to use --enable-linuxfb, otherwise Qt thinks that -linuxfb
# is to add a link against the "inuxfb" library.
QT5BASE_CONFIGURE_OPTS += $(if $(BR2_PACKAGE_QT5BASE_GUI),-gui,-no-gui)
QT5BASE_CONFIGURE_OPTS += $(if
$(BR2_PACKAGE_QT5BASE_WIDGETS),-widgets,-no-widgets)
QT5BASE_CONFIGURE_OPTS += $(if
$(BR2_PACKAGE_QT5BASE_LINUXFB),--enable-linuxfb,-no-linuxfb)
QT5BASE_CONFIGURE_OPTS += $(if
$(BR2_PACKAGE_QT5BASE_DIRECTFB),-directfb,-no-directfb)
QT5BASE_DEPENDENCIES   += $(if $(BR2_PACKAGE_QT5BASE_DIRECTFB),directfb)

ifeq ($(BR2_PACKAGE_QT5BASE_XCB),y)
QT5BASE_CONFIGURE_OPTS += -xcb
QT5BASE_DEPENDENCIES   += \
	libxcb \
	xcb-util-wm \
	xcb-util-image \
	xcb-util-keysyms \
	xlib_libX11
else
QT5BASE_CONFIGURE_OPTS += -no-xcb
endif

QT5BASE_ADDITIONAL_INCLUDE_PATHS = $(STAGING_DIR)/usr/include

ifeq ($(BR2_PACKAGE_QT5BASE_EGLFS),y)
QT5BASE_CONFIGURE_OPTS += -opengl es2 -eglfs
QT5BASE_DEPENDENCIES   += libgles libegl
QT5BASE_INCDIR_OPENGL_ES2 =
QT5BASE_LIBDIR_OPENGL_ES2 =
QT5BASE_LIBS_OPENGL_ES2   =
QT5BASE_INCDIR_EGL =
QT5BASE_LIBDIR_EGL =
QT5BASE_LIBS_EGL =
QT5BASE_INCDIR_OPENVG =
QT5BASE_LIBDIR_OPENVG =
QT5BASE_LIBS_OPENVG =
ifeq ($(BR2_PACKAGE_RPI_USERLAND),y)
QT5BASE_EGLFS_PLATFORM_HOOKS_SOURCES = \
	$(@D)/mkspecs/devices/linux-rasp-pi-g++/qeglfshooks_pi.cpp
endif
ifeq ($(BR2_PACKAGE_GPU_VIV_BIN_IMX6Q),y)
QT5BASE_EGLFS_PLATFORM_HOOKS_SOURCES = \
	$(@D)/mkspecs/devices/linux-imx6-g++/qeglfshooks_imx6.cpp
TARGET_CFLAGS   += -mfloat-abi=softfp -mfpu=neon -DLINUX=1 -DEGL_API_FB=1
# TARGET_CXXFLAGS += -mfloat-abi=softfp -mfpu=neon -DLINUX=1 -DEGL_API_FB=1
# need to add the library paths here too
QT5BASE_INCDIR_OPENGL_ES2 += $(STAGING_DIR)/usr/include
QT5BASE_LIBDIR_OPENGL_ES2 += $(STAGING_DIR)/usr/lib
QT5BASE_LIBS_OPENGL_ES2   += -lGLESv2 -lEGL-fb -lGAL-fb
QT5BASE_INCDIR_EGL        += $(STAGING_DIR)/usr/include
QT5BASE_LIBDIR_EGL        += $(STAGING_DIR)/usr/lib
QT5BASE_LIBS_EGL          += -lEGL-fb
QT5BASE_INCDIR_OPENVG     += $(STAGING_DIR)/usr/include
QT5BASE_LIBDIR_OPENVG     += $(STAGING_DIR)/usr/lib
QT5BASE_LIBS_OPENVG       += -lOpenVG -lEGL-fb -lGAL-fb
# QT5BASE_ADDITIONAL_INCLUDE_PATHS += $(STAGING_DIR)/usr/include/directfb

endif
else
QT5BASE_CONFIGURE_OPTS += -no-opengl -no-eglfs
endif

QT5BASE_CONFIGURE_OPTS += $(if $(BR2_PACKAGE_OPENSSL),-openssl,-no-openssl)
QT5BASE_DEPENDENCIES   += $(if $(BR2_PACKAGE_OPENSSL),openssl)

QT5BASE_CONFIGURE_OPTS += $(if
$(BR2_PACKAGE_QT5BASE_FONTCONFIG),-fontconfig,-no-fontconfig)
QT5BASE_DEPENDENCIES   += $(if $(BR2_PACKAGE_QT5BASE_FONTCONFIG),fontconfig)
QT5BASE_CONFIGURE_OPTS += $(if $(BR2_PACKAGE_QT5BASE_GIF),,-no-gif)
QT5BASE_CONFIGURE_OPTS += $(if
$(BR2_PACKAGE_QT5BASE_JPEG),-system-libjpeg,-no-libjpeg)
QT5BASE_DEPENDENCIES   += $(if $(BR2_PACKAGE_QT5BASE_JPEG),jpeg)
QT5BASE_CONFIGURE_OPTS += $(if
$(BR2_PACKAGE_QT5BASE_PNG),-system-libpng,-no-libpng)
QT5BASE_DEPENDENCIES   += $(if $(BR2_PACKAGE_QT5BASE_PNG),libpng)

QT5BASE_CONFIGURE_OPTS += $(if $(BR2_PACKAGE_QT5BASE_DBUS),-dbus,-no-dbus)
QT5BASE_DEPENDENCIES   += $(if $(BR2_PACKAGE_QT5BASE_DBUS),dbus)

QT5BASE_CONFIGURE_OPTS += $(if $(BR2_PACKAGE_LIBGLIB2),-glib,-no-glib)
QT5BASE_DEPENDENCIES   += $(if $(BR2_PACKAGE_LIBGLIB2),libglib2)

QT5BASE_CONFIGURE_OPTS += $(if $(BR2_PACKAGE_QT5BASE_ICU),-icu,-no-icu)
QT5BASE_DEPENDENCIES   += $(if $(BR2_PACKAGE_QT5BASE_ICU),icu)

# Build the list of libraries to be installed on the target
QT5BASE_INSTALL_LIBS_y                                 += Qt5Core
QT5BASE_INSTALL_LIBS_$(BR2_PACKAGE_QT5BASE_NETWORK)    += Qt5Network
QT5BASE_INSTALL_LIBS_$(BR2_PACKAGE_QT5BASE_CONCURRENT) += Qt5Concurrent
QT5BASE_INSTALL_LIBS_$(BR2_PACKAGE_QT5BASE_SQL)        += Qt5Sql
QT5BASE_INSTALL_LIBS_$(BR2_PACKAGE_QT5BASE_TEST)       += Qt5Test
QT5BASE_INSTALL_LIBS_$(BR2_PACKAGE_QT5BASE_XML)        += Qt5Xml

QT5BASE_INSTALL_LIBS_$(BR2_PACKAGE_QT5BASE_GUI)          += Qt5Gui
QT5BASE_INSTALL_LIBS_$(BR2_PACKAGE_QT5BASE_WIDGETS)      += Qt5Widgets
QT5BASE_INSTALL_LIBS_$(BR2_PACKAGE_QT5BASE_PRINTSUPPORT) += Qt5PrintSupport

QT5BASE_INSTALL_LIBS_$(BR2_PACKAGE_QT5BASE_DBUS) += Qt5DBus

# Ideally, we could use -device-option to substitute variable values
# in our linux-buildroot-g++/qmake.config, but this mechanism doesn't
# nicely support variable values that contain spaces. So we use the
# good old sed solution here.
define QT5BASE_CONFIG_SET
	$(SED) 's%^$(1).*%$(1) = $(2)%g'
$(@D)/mkspecs/devices/linux-buildroot-g++/qmake.conf
endef

define QT5BASE_CONFIGURE_CMDS
	$(call QT5BASE_CONFIG_SET,BUILDROOT_CROSS_COMPILE,$(TARGET_CROSS))
	$(call QT5BASE_CONFIG_SET,BUILDROOT_COMPILER_CFLAGS,$(TARGET_CFLAGS))
	$(call QT5BASE_CONFIG_SET,BUILDROOT_COMPILER_CXXFLAGS,$(TARGET_CXXFLAGS))
	$(call
QT5BASE_CONFIG_SET,BUILDROOT_INCLUDE_PATH,$(QT5BASE_ADDITIONAL_INCLUDE_PATHS))
	$(call
QT5BASE_CONFIG_SET,BUILDROOT_INCDIR_OPENGL_ES2,$(QT5BASE_INCDIR_OPENGL_ES2))
	$(call
QT5BASE_CONFIG_SET,BUILDROOT_LIBDIR_OPENGL_ES2,$(QT5BASE_LIBDIR_OPENGL_ES2))
	$(call
QT5BASE_CONFIG_SET,BUILDROOT_LIBS_OPENGL_ES2,$(QT5BASE_LIBS_OPENGL_ES2))
	$(call QT5BASE_CONFIG_SET,BUILDROOT_INCDIR_EGL,$(QT5BASE_INCDIR_EGL))
	$(call QT5BASE_CONFIG_SET,BUILDROOT_LIBDIR_EGL,$(QT5BASE_LIBDIR_EGL))
	$(call QT5BASE_CONFIG_SET,BUILDROOT_LIBS_EGL,$(QT5BASE_LIBS_EGL))
	$(call QT5BASE_CONFIG_SET,BUILDROOT_INCDIR_OPENVG,$(QT5BASE_INCDIR_OPENVG))
	$(call QT5BASE_CONFIG_SET,BUILDROOT_LIBDIR_OPENVG,$(QT5BASE_LIBDIR_OPENVG))
	$(call QT5BASE_CONFIG_SET,BUILDROOT_LIBS_OPENVG,$(QT5BASE_LIBS_OPENVG))
	$(call QT5BASE_CONFIG_SET,EGLFS_PLATFORM_HOOKS_SOURCES, \
		$(QT5BASE_EGLFS_PLATFORM_HOOKS_SOURCES))
	(cd $(@D); \
		PKG_CONFIG="$(PKG_CONFIG_HOST_BINARY)" \
		PKG_CONFIG_LIBDIR="$(STAGING_DIR)/usr/lib/pkgconfig" \
		PKG_CONFIG_SYSROOT_DIR="$(STAGING_DIR)" \
		MAKEFLAGS="$(MAKEFLAGS) -j$(PARALLEL_JOBS)" \
		./configure \
		-v \
		-prefix /usr \
		-hostprefix $(HOST_DIR)/usr \
		-sysroot $(STAGING_DIR) \
		-plugindir /usr/lib/qt/plugins \
		-no-rpath \
		-nomake examples -nomake demos -nomake tests \
		-device buildroot \
		-no-c++11 \
		$(QT5BASE_CONFIGURE_OPTS) \
	)
endef

define QT5BASE_BUILD_CMDS
	$(MAKE) -C $(@D)
endef

define QT5BASE_INSTALL_STAGING_CMDS
	$(MAKE) -C $(@D) install
	$(QT5_LA_PRL_FILES_FIXUP)
endef

define QT5BASE_INSTALL_TARGET_LIBS
	for lib in $(QT5BASE_INSTALL_LIBS_y); do \
		cp -dpf $(STAGING_DIR)/usr/lib/lib$${lib}.so.* $(TARGET_DIR)/usr/lib ; \
	done
endef

define QT5BASE_INSTALL_TARGET_PLUGINS
	if [ -d $(STAGING_DIR)/usr/lib/qt/plugins/ ] ; then \
		mkdir -p $(TARGET_DIR)/usr/lib/qt/plugins ; \
		cp -dpfr $(STAGING_DIR)/usr/lib/qt/plugins/*
$(TARGET_DIR)/usr/lib/qt/plugins ; \
	fi
endef

define QT5BASE_INSTALL_TARGET_FONTS
	if [ -d $(STAGING_DIR)/usr/lib/fonts/ ] ; then \
		mkdir -p $(TARGET_DIR)/usr/lib/fonts ; \
		cp -dpfr $(STAGING_DIR)/usr/lib/fonts/* $(TARGET_DIR)/usr/lib/fonts ; \
	fi
endef

ifeq ($(BR2_PREFER_STATIC_LIB),y)
define QT5BASE_INSTALL_TARGET_CMDS
	$(QT5BASE_INSTALL_TARGET_FONTS)
endef
else
define QT5BASE_INSTALL_TARGET_CMDS
	$(QT5BASE_INSTALL_TARGET_LIBS)
	$(QT5BASE_INSTALL_TARGET_PLUGINS)
	$(QT5BASE_INSTALL_TARGET_FONTS)
endef
endif

$(eval $(generic-package))
=================================

[Buildroot] iMX6Q package proposals for Qt5

[Thomas Petazzoni]

Dear H.Fijnvandraat at inter.nl.net,

On Mon, 22 Apr 2013 13:14:34 +0200 (CEST), H.Fijnvandraat at inter.nl.net
wrote:

> With this email I inline the changes I made in package/qt5/qt5base
> directory files.

Could you please instead send patches against Buildroot? Copy/pasting
your modified files is not very helpful unfortunately :/

Thanks!

Thomas
-- 
Thomas Petazzoni, Free Electrons
Kernel, drivers, real-time and embedded Linux
development, consulting, training and support.
http://free-electrons.com