[Issue 12756] New: Cannot build dmd on windows because of longdouble

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=12756

          Issue ID: 12756
           Summary: Cannot build dmd on windows because of longdouble
           Product: D
           Version: D2
          Hardware: All
                OS: Windows
            Status: NEW
          Severity: blocker
          Priority: P1
         Component: DMD
          Assignee: nobody at puremagic.com
          Reporter: temtaime at gmail.com

constfold.c(136): error: no suitable constructor exists to convert from
"double" to "longdouble"
          real_t r1 = 0.0;
                      ^
constfold.c(137): error: no suitable constructor exists to convert from
"double" to "longdouble"
          real_t i1 = 0.0;
                      ^
constfold.c(140): error: no suitable constructor exists to convert from
"double" to "longdouble"
          real_t r2 = 0.0;
                      ^
constfold.c(141): error: no suitable constructor exists to convert from
"double" to "longdouble"
          real_t i2 = 0.0;
                      ^
constfold.c(221): error: no suitable constructor exists to convert from
"double" to "longdouble"
          real_t r1 = 0.0;
                      ^
constfold.c(222): error: no suitable constructor exists to convert from
"double" to "longdouble"
          real_t i1 = 0.0;
                      ^
constfold.c(225): error: no suitable constructor exists to convert from
"double" to "longdouble"
          real_t r2 = 0.0;
                      ^
constfold.c(226): error: no suitable constructor exists to convert from
"double" to "longdouble"
          real_t i2 = 0.0;
                      ^

This errors because MSVC uses longdouble emulation.

longdouble is a struct that doesn't have operator=.

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