package/cairo/0001-blackfin-build-fix.patch

   1 Fix build on platforms where __USER_LABEL_PREFIX__ is not empty
   2
   3 On most platforms, a C language symbol and its assembly equivalent are
   4 identical. However, on the Blackfin architecture, this isn't the case,
   5 the corresponding C language symbol in assembly is prepended with a
   6 "_". Blackfin therefore has __USER_LABEL_PREFIX__ defined to "_".
   7
   8 Cairo already has some code to cope with __USER_LABEL_PREFIX__, but
   9 this code isn't completely correct: it prepends both assembly symbols
  10 and C symbols with __USER_LABEL_PREFIX__, which cannot work.
  11
  12 This patch fixes that by using the existing slim_hidden_asmname() to
  13 define assembly symbols, and introduce a new slim_hidden_realname()
  14 for C symbols.
  15
  16 Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
  17
  18 Index: b/src/cairo-compiler-private.h
  19 ===================================================================
  20 --- a/src/cairo-compiler-private.h
  21 +++ b/src/cairo-compiler-private.h
  22 @@ -93,12 +93,13 @@
  23         __asm__ (slim_hidden_asmname (internal))
  24  # define slim_hidden_def1(name, internal)                              \
  25    extern __typeof (name) EXT_##name __asm__(slim_hidden_asmname(name)) \
  26 -       __attribute__((__alias__(slim_hidden_asmname(internal))))
  27 +       __attribute__((__alias__(slim_hidden_realname(internal))))
  28  # define slim_hidden_ulp               slim_hidden_ulp1(__USER_LABEL_PREFIX__)
  29  # define slim_hidden_ulp1(x)           slim_hidden_ulp2(x)
  30  # define slim_hidden_ulp2(x)           #x
  31  # define slim_hidden_asmname(name)     slim_hidden_asmname1(name)
  32  # define slim_hidden_asmname1(name)    slim_hidden_ulp #name
  33 +# define slim_hidden_realname(name)     #name
  34  #else
  35  # define slim_hidden_proto(name)               int _cairo_dummy_prototype(void)
  36  # define slim_hidden_proto_no_warn(name)       int _cairo_dummy_prototype(void)
  37 Index: b/util/cairo-script/cairo-script-private.h
  38 ===================================================================
  39 --- a/util/cairo-script/cairo-script-private.h
  40 +++ b/util/cairo-script/cairo-script-private.h
  41 @@ -109,12 +109,13 @@
  42         __asm__ (slim_hidden_asmname (internal))
  43  # define slim_hidden_def1(name, internal)                              \
  44    extern __typeof (name) EXT_##name __asm__(slim_hidden_asmname(name)) \
  45 -       __attribute__((__alias__(slim_hidden_asmname(internal))))
  46 +       __attribute__((__alias__(slim_hidden_realname(internal))))
  47  # define slim_hidden_ulp               slim_hidden_ulp1(__USER_LABEL_PREFIX__)
  48  # define slim_hidden_ulp1(x)           slim_hidden_ulp2(x)
  49  # define slim_hidden_ulp2(x)           #x
  50  # define slim_hidden_asmname(name)     slim_hidden_asmname1(name)
  51  # define slim_hidden_asmname1(name)    slim_hidden_ulp #name
  52 +# define slim_hidden_realname(name)     #name
  53  #else
  54  # define slim_hidden_proto(name)               int _csi_dummy_prototype(void)
  55  # define slim_hidden_proto_no_warn(name)       int _csi_dummy_prototype(void)