Make log and exp no-strip.

lib/std/math/math_nolibc/exp.c3

@@ -17,7 +17,7 @@ const float EXPF_P2 = -2.7777778450e-03f;
 const float EXPF_P3 = 6.6137559770e-05f;
 const float EXPF_P4 = -1.6533901999e-06f;
 
-fn double exp(double x) @extern("exp")
+fn double exp(double x) @extern("exp") @nostrip @weak
 {
     if (x != x) return x;
     if (x == double.inf) return double.inf;
@@ -38,7 +38,7 @@ fn double exp(double x) @extern("exp")
     return ldexp(exp_r, (int)k);
 }
 
-fn float expf(float x) @extern("expf")
+fn float expf(float x) @extern("expf") @nostrip @weak
 {
     if (x != x) return x;
     if (x == float.inf) return float.inf;

lib/std/math/math_nolibc/log.c3

@@ -19,7 +19,7 @@ const float LOGF_L4 = 2.4279078841e-01f;
 const double SQRT2 = 1.41421356237309504880;
 const float SQRT2F = 1.41421356237309504880f;
 
-fn double log(double x) @extern("log")
+fn double log(double x) @extern("log") @nostrip @weak
 {
     if (x != x) return x;
     if (x < 0.0) return double.nan;
@@ -50,7 +50,7 @@ fn double log(double x) @extern("log")
     return k * LOG_LN2_HI - ((hfsq - (s * (hfsq + r) + k * LOG_LN2_LO)) - f);
 }
 
-fn float logf(float x) @extern("logf")
+fn float logf(float x) @extern("logf") @nostrip @weak
 {
     if (x != x) return x;
     if (x < 0.0f) return float.nan;

lib/std/os/nolibc.c3

@@ -0,0 +1,6 @@
+module std::math::nolibc @if(env::NO_LIBC);
+
+fn void __stack_chk_fail() @extern("__stack_chk_fail") @nostrip @noreturn @weak
+{
+	$$trap();
+}

releasenotes.md

@@ -75,6 +75,7 @@
 - Grabbing (missing) methods on function pointers would cause crash #2434.
 - Fix alignment on jump table.
 - Fix correct `?` after optional function name when reporting type errors.
+- Make `log` and `exp` no-strip.
 
 ### Stdlib changes
 - Add `==` to `Pair`, `Triple` and TzDateTime. Add print to `Pair` and `Triple`.