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Handle old versions of visual studio

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This commit is contained in:
Richard Dodd 2019-05-10 13:42:02 +01:00
parent 4db226c0df
commit a50d37bd3a
1 changed files with 17 additions and 1 deletions
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18
libsqlite3-sys/build.rs
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@ -70,11 +70,27 @@ mod build_bundled {
.flag("-DSQLITE_ENABLE_RTREE")
.flag("-DSQLITE_ENABLE_STAT2")
.flag("-DSQLITE_ENABLE_STAT4")
.flag("-DSQLITE_HAVE_ISNAN")
.flag("-DSQLITE_SOUNDEX")
.flag("-DSQLITE_THREADSAFE=1")
.flag("-DSQLITE_USE_URI")
.flag("-DHAVE_USLEEP=1");
// Older versions of visual studio don't support c99 (including isnan), which causes a
// build failure when the linker fails to find the `isnan` function. `sqlite` provides its
// own implmentation, using the fact that x != x when x is NaN.
//
// There may be other platforms that don't support `isnan`, they should be tested for here.
if cfg!(target_env = "msvc") {
use self::cc::windows_registry::{find_vs_version, VsVers};
let vs_has_nan = match find_vs_version() {
Ok(ver) => ver != VsVers::Vs12,
Err(_msg) => false,
};
if vs_has_nan {
cfg.flag("-DSQLITE_HAVE_ISNAN");
}
} else {
cfg.flag("-DSQLITE_HAVE_ISNAN");
}
if cfg!(feature = "unlock_notify") {
cfg.flag("-DSQLITE_ENABLE_UNLOCK_NOTIFY");
}