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libmodbus: fix for cross compilation

This commit is contained in:
Michael Eden 2019-03-16 11:53:14 -04:00
parent 33e9fa2367
commit bce7e3b585
1 changed files with 10 additions and 0 deletions
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10
pkgs/development/libraries/libmodbus/default.nix
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@ -8,6 +8,16 @@ stdenv.mkDerivation rec {
sha256 = "0drnil8bzd4n4qb0wv3ilm9zvypxvwmzd65w96d6kfm7x6q65j68";
};
configureFlags = [
# when cross-compiling we assume that the host system will return a valid
# pointer for calls to malloc(0) or realloc(0)
# https://www.uclibc.org/FAQ.html#gnu_malloc
# https://www.gnu.org/software/autoconf/manual/autoconf.html#index-AC_005fFUNC_005fMALLOC-454
# the upstream source should be patched to avoid needing this
"ac_cv_func_malloc_0_nonnull=yes"
"ac_cv_func_realloc_0_nonnull=yes"
];
meta = with stdenv.lib; {
description = "Library to send/receive data according to the Modbus protocol";
homepage = http://libmodbus.org/;