On Thursday, 19 July 2018 at 12:44:30 UTC, Radu wrote:
---
int foo()
{
import std.algorithm, std.range;
auto r = 100.iota.stride(2).take(5);
return r.sum();
}
---
ldc2 -mtriple=wasm32-unknown-unknown-wasm -betterC
-link-internally -L-allow-undefined -release -Os wasm.d
ldc\bin\..\import\core\stdc\stdio.d(31): Error: module
`core.stdc.stdint` import intptr_t not found
ldc\bin\..\import\core\stdc\stdio.d(1149): Error: undefined
identifier FILE
....
This is a prime example of stuff that should just workTM on
targets like that. I would like to submit some fixes but I
think there needs to be a more systematic approach on making
more core APIs modular.
Removing some superfluous explicit druntime dependencies from
Phobos would be a start. Your (nice) example compiles fine with
this 4-lines Phobos hack:
---
diff --git a/std/ascii.d b/std/ascii.d
index 8622785b1..b3815cafd 100644
--- a/std/ascii.d
+++ b/std/ascii.d
@@ -105,10 +105,10 @@ enum LetterCase : bool
/// Newline sequence for this system.
version(Windows)
immutable newline = "\r\n";
-else version(Posix)
+else// version(Posix)
immutable newline = "\n";
-else
- static assert(0, "Unsupported OS");
+//else
+// static assert(0, "Unsupported OS");
/++
diff --git a/std/typecons.d b/std/typecons.d
index 203ab05f4..49edebfaf 100644
--- a/std/typecons.d
+++ b/std/typecons.d
@@ -68,7 +68,8 @@ Authors: $(HTTP erdani.org, Andrei
Alexandrescu),
*/
module std.typecons;
-import core.stdc.stdint : uintptr_t;
+//import core.stdc.stdint : uintptr_t;
+alias uintptr_t = size_t;
import std.format : singleSpec, FormatSpec, formatValue;
import std.meta; // : AliasSeq, allSatisfy;
import std.range.primitives : isOutputRange;
---
Importing core.stdc.stdint for `uintptr_t` in std.typecons is
particularly troublesome and totally unnecessary. It leads to
importing (see -v output):
core.stdc.stdint
core.stdc.config
core.stdc.stddef
core.stdc.signal
core.stdc.wchar_
core.stdc.stdarg
core.stdc.stdio
core.stdc.time
whereas after the hack, it's only `core.stdc.stdarg`, and no
core.stdc.* hacks for `version(WebAssembly)` are required to
import std.algorithm and std.range.
[I'll open a PR for std.typecons.]
