src/check-symbols.sh

   1 #!/bin/sh
   2
   3 LC_ALL=C
   4 export LC_ALL
   5
   6 test -z "$srcdir" && srcdir=.
   7 test -z "$libs" && libs=.libs
   8 stat=0
   9
  10 IGNORED_SYMBOLS='_fini\|_init\|_fdata\|_ftext\|_fbss\|__bss_start\|__bss_start__\|__bss_end__\|_edata\|_end\|_bss_end__\|__end__\|__gcov_flush\|llvm_.*'
  11
  12 if which nm 2>/dev/null >/dev/null; then
  13         :
  14 else
  15         echo "check-symbols.sh: 'nm' not found; skipping test"
  16         exit 77
  17 fi
  18
  19 tested=false
  20 for soname in harfbuzz harfbuzz-subset harfbuzz-icu harfbuzz-gobject; do
  21         for suffix in so dylib; do
  22                 so=$libs/lib$soname.$suffix
  23                 if ! test -f "$so"; then continue; fi
  24
  25                 # On macOS, C symbols are prefixed with _
  26                 symprefix=
  27                 if test $suffix = dylib; then symprefix=_; fi
  28
  29                 EXPORTED_SYMBOLS="`nm "$so" | grep ' [BCDGINRST] .' | grep -v " $symprefix\\($IGNORED_SYMBOLS\\>\\)" | cut -d' ' -f3 | c++filt`"
  30
  31                 prefix=$symprefix`basename "$so" | sed 's/libharfbuzz/hb/; s/-/_/g; s/[.].*//'`
  32
  33                 echo "Checking that $so does not expose internal symbols"
  34                 if echo "$EXPORTED_SYMBOLS" | grep -v "^${prefix}\(_\|$\)"; then
  35                         echo "Ouch, internal symbols exposed"
  36                         stat=1
  37                 fi
  38
  39                 def=$soname.def
  40                 if ! test -f "$def"; then
  41                         echo "'$def' not found; skipping"
  42                 else
  43                         echo "Checking that $so has the same symbol list as $def"
  44                         {
  45                                 echo EXPORTS
  46                                 echo "$EXPORTED_SYMBOLS" | sed -e "s/^${symprefix}hb/hb/g"
  47                                 # cheat: copy the last line from the def file!
  48                                 tail -n1 "$def"
  49                         } | c++filt | diff "$def" - >&2 || stat=1
  50                 fi
  51
  52                 tested=true
  53         done
  54 done
  55 if ! $tested; then
  56         echo "check-symbols.sh: no shared libraries found; skipping test"
  57         exit 77
  58 fi
  59
  60 exit $stat