package/skalibs/0001-No-runtime-tests-for-endianness.patch

   1 From 6754b208e7ec3bd1d4265db18fa4c0e7961a77bf Mon Sep 17 00:00:00 2001
   2 From: Eric Le Bihan <eric.le.bihan.dev@free.fr>
   3 Date: Mon, 20 Mar 2017 20:05:00 +0100
   4 Subject: [PATCH] No runtime tests for endianness
   5
   6 Replace build and execution of runtime test programs for determining
   7 the endianness of the target with compile time test programs.
   8
   9 This improves support for cross-compilation.
  10
  11 Signed-off-by: Eric Le Bihan <eric.le.bihan.dev@free.fr>
  12 ---
  13  configure                     | 15 +++++++++++----
  14  src/sysdeps/trybigendian.c    | 16 ++++++++++++++++
  15  src/sysdeps/trylittleendian.c | 19 +++++++++++++++++++
  16  3 files changed, 46 insertions(+), 4 deletions(-)
  17  create mode 100644 src/sysdeps/trybigendian.c
  18  create mode 100644 src/sysdeps/trylittleendian.c
  19
  20 diff --git a/configure b/configure
  21 index 1579025..4da9c5e 100755
  22 --- a/configure
  23 +++ b/configure
  24 @@ -463,13 +463,20 @@ EOF
  25    fi
  26    exec 3>&-
  27
  28 -  echo "Checking system endianness..."
  29 -  $CC_AUTO $CPPFLAGS_AUTO $CFLAGS_AUTO -o tryendianness src/sysdeps/tryendianness.c
  30 -  endianness=$(./tryendianness) || fail "$0: unable to determine endianness"
  31 +    echo "Checking system endianness..."
  32 +  if $CC_AUTO $CPPFLAGS_AUTO $CFLAGS_AUTO -o trybigendian src/sysdeps/trybigendian.c 2>/dev/null; then
  33 +      endianness=big
  34 +  else
  35 +      if $CC_AUTO $CPPFLAGS_AUTO $CFLAGS_AUTO -o trylittleendian src/sysdeps/trylittleendian.c 2>/dev/null; then
  36 +          endianness=little
  37 +      else
  38 +          fail "$0: unable to determine endianness"
  39 +      fi
  40 +  fi
  41    echo "endianness: $endianness" >> $sysdeps/sysdeps
  42    echo "#define ${package_macro_name}_ENDIANNESS \"$endianness\"" >> $sysdeps/sysdeps.h
  43    echo "  ... $endianness"
  44 -  rm -f tryendianness
  45 +  rm -f trybigendian trylittleendian
  46
  47    trytypesize ushort USHORT "unsigned short"
  48    trytypesize uint UINT "unsigned int"
  49 diff --git a/src/sysdeps/trybigendian.c b/src/sysdeps/trybigendian.c
  50 new file mode 100644
  51 index 0000000..d857572
  52 --- /dev/null
  53 +++ b/src/sysdeps/trybigendian.c
  54 @@ -0,0 +1,16 @@
  55 +#if defined(__BYTE_ORDER) && (__BYTE_ORDER == __BIG_ENDIAN) ||        \
  56 +       defined(__BYTE_ORDER__) && (__BYTE_ORDER__  == __ORDER_BIG_ENDIAN__) || \
  57 +       defined(__BIG_ENDIAN) ||                                       \
  58 +       defined(__ARMEB__) ||                                          \
  59 +       defined(__THUMBEB__) ||                                \
  60 +       defined(__AARCH64EB__) ||                                      \
  61 +       defined(_MIPSEB) || defined(__MIPSEB) || defined(__MIPSEB__)
  62 +#define YEAH
  63 +#else
  64 +#error "not big endian"
  65 +#endif
  66 +
  67 +int main(void)
  68 +{
  69 +       return 0;
  70 +}
  71 diff --git a/src/sysdeps/trylittleendian.c b/src/sysdeps/trylittleendian.c
  72 new file mode 100644
  73 index 0000000..68b93c1
  74 --- /dev/null
  75 +++ b/src/sysdeps/trylittleendian.c
  76 @@ -0,0 +1,19 @@
  77 +#if defined(__BYTE_ORDER) && (__BYTE_ORDER == __LITTLE_ENDIAN) ||      \
  78 +       defined(__BYTE_ORDER__) && (__BYTE_ORDER__  == __ORDER_LITTLE_ENDIAN__) || \
  79 +       defined(__LITTLE_ENDIAN) ||                                     \
  80 +       defined(__ARMEL__) ||                                           \
  81 +       defined(__THUMBEL__) ||                                 \
  82 +       defined(__AARCH64EL__) ||                                       \
  83 +       defined(__i386) || defined(__i386__) ||                 \
  84 +       defined(__amd64) || defined(__amd64__) ||                       \
  85 +       defined(__x86_64) || defined(__x86_64__) ||                     \
  86 +       defined(_MIPSEL) || defined(__MIPSEL) || defined(__MIPSEL__)
  87 +#define YEAH
  88 +#else
  89 +#error "not little endian"
  90 +#endif
  91 +
  92 +int main(void)
  93 +{
  94 +       return 0;
  95 +}
  96 --
  97 2.1.4
  98