From 3154fee4db6d14e72050c7efc6a6f4eb06d01d4a Mon Sep 17 00:00:00 2001 From: Marc-André Lureau Date: Thu, 29 Aug 2019 22:07:01 +0400 Subject: meson: add modules infrastructure Signed-off-by: Marc-André Lureau Signed-off-by: Paolo Bonzini --- scripts/undefsym.sh | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) create mode 100755 scripts/undefsym.sh (limited to 'scripts') diff --git a/scripts/undefsym.sh b/scripts/undefsym.sh new file mode 100755 index 0000000000..b9ec332e95 --- /dev/null +++ b/scripts/undefsym.sh @@ -0,0 +1,20 @@ +#! /usr/bin/env bash + +# Before a shared module's DSO is produced, a static library is built for it +# and passed to this script. The script generates -Wl,-u options to force +# the inclusion of symbol from libqemuutil.a if the shared modules need them, +# This is necessary because the modules may use functions not needed by the +# executable itself, which would cause the function to not be linked in. +# Then the DSO loading would fail because of the missing symbol. + +if test $# -le 2; then + exit 0 +fi + +NM=$1 +staticlib=$2 +shift 2 +# Find symbols defined in static libraries and undefined in shared modules +comm -12 \ + <( $NM -P -g $staticlib | awk '$2!="U"{print "-Wl,-u," $1}' | sort -u) \ + <( $NM -P -g "$@" | awk '$2=="U"{print "-Wl,-u," $1}' | sort -u) -- cgit v1.2.3-55-g7522