[gcc r11-6260] libstdc++: Fix build failure on AArch64 ILP32 [PR98370]

[Patrick Palka <ppalka@gcc.gnu.org>]

https://gcc.gnu.org/g:22a7e82c200d01d12e34e757e86dc9796a9bf085

commit r11-6260-g22a7e82c200d01d12e34e757e86dc9796a9bf085
Author: Patrick Palka <ppalka@redhat.com>
Date:   Fri Dec 18 11:52:24 2020 -0500

    libstdc++: Fix build failure on AArch64 ILP32 [PR98370]
    
    This should fix a build failure on AArch64 ILP32 due to int32_t mapping
    to long int instead of int on this platform, which causes type deduction
    to fail in the below call to std::max as reported in the PR.
    
    libstdc++-v3/ChangeLog:
    
            PR libstdc++/98370
            * src/c++17/floating_to_chars.cc (__floating_to_chars_shortest):
            Provide explicit template arguments to the call to std::max.

Diff:
---
 libstdc++-v3/src/c++17/floating_to_chars.cc | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/libstdc++-v3/src/c++17/floating_to_chars.cc b/libstdc++-v3/src/c++17/floating_to_chars.cc
index 6470fbb0b95..3f46bce7a15 100644
--- a/libstdc++-v3/src/c++17/floating_to_chars.cc
+++ b/libstdc++-v3/src/c++17/floating_to_chars.cc
@@ -977,7 +977,7 @@ template<typename T>
 	// fd.exponent contain all of the information needed to format the
 	// number in fixed notation "as if by std::printf" (with precision
 	// equal to -fd.exponent).
-	const int whole_digits = max(mantissa_length + fd.exponent, 1);
+	const int whole_digits = max<int>(mantissa_length + fd.exponent, 1);
 	const int expected_output_length
 	  = fd.sign + whole_digits + strlen(".") + -fd.exponent;
 	if (last - first < expected_output_length)