commit 8fda72f6d8e442c5382f21cdd884e2c962bb53bd
author Rosen Penev <rosenp@gmail.com> Wed Dec 11 13:25:32 2019 -0800
committer Shane F. Carr <shane@unicode.org> Wed Dec 11 20:55:23 2019 -0800
tree 44165ee4f41bb1a13e05aff7182668e45603cb13
parent c6fd07cdecce8fc3a517258d5145e89cd2781a9b

ICU-20877 i18n: Don't use C++11 math

It's not available with some libc implementations. Specifically,
BIONIC and uClibc-ng. uprv_ variants are available.

Signed-off-by: Rosen Penev <rosenp@gmail.com>

icu4c/source/i18n/decimfmt.cpp

diff --git a/icu4c/source/i18n/decimfmt.cpp b/icu4c/source/i18n/decimfmt.cpp
index 4015250..0cbaca7 100644
--- a/icu4c/source/i18n/decimfmt.cpp
+++ b/icu4c/source/i18n/decimfmt.cpp
@@ -1801,7 +1801,7 @@
         return false;
     }
     if (std::isnan(input)
-            || std::trunc(input) != input
+            || uprv_trunc(input) != input
             || input <= INT32_MIN
             || input > INT32_MAX) {
         return false;

icu4c/source/i18n/number_decimalquantity.cpp

diff --git a/icu4c/source/i18n/number_decimalquantity.cpp b/icu4c/source/i18n/number_decimalquantity.cpp
index abbc23d..778feb1 100644
--- a/icu4c/source/i18n/number_decimalquantity.cpp
+++ b/icu4c/source/i18n/number_decimalquantity.cpp
@@ -456,7 +456,7 @@
         for (; i <= -22; i += 22) n /= 1e22;
         n /= DOUBLE_MULTIPLIERS[-i];
     }
-    auto result = static_cast<int64_t>(std::round(n));
+    auto result = static_cast<int64_t>(uprv_round(n));
     if (result != 0) {
         _setToLong(result);
         scale -= fracLength;