llvm-project/clang/test/Driver/mdouble.c

// RUN: %clang -target avr -c -### %s -mdouble=64 2>&1 | FileCheck %s

// CHECK: "-mdouble=64"

// RUN: %clang -target aarch64 -c -### %s -mdouble=64 2>&1 | FileCheck --check-prefix=ERR %s

// ERR: error: unsupported option '-mdouble=64' for target 'aarch64'
[AVR] Add support for the -mdouble=x flag This flag is used by avr-gcc (starting with v10) to set the width of the double type. The double type is by default interpreted as a 32-bit floating point number in avr-gcc instead of a 64-bit floating point number as is common on other architectures. Starting with GCC 10, a new option has been added to control this behavior: https://gcc.gnu.org/wiki/avr-gcc#Deviations_from_the_Standard This commit keeps the default double at 32 bits but adds support for the -mdouble flag (-mdouble=32 and -mdouble=64) to control this behavior. Differential Revision: https://reviews.llvm.org/D76181 2020-03-15 01:55:13 +08:00			`// RUN: %clang -target avr -c -### %s -mdouble=64 2>&1 \| FileCheck %s`

			`// CHECK: "-mdouble=64"`

			`// RUN: %clang -target aarch64 -c -### %s -mdouble=64 2>&1 \| FileCheck --check-prefix=ERR %s`

			`// ERR: error: unsupported option '-mdouble=64' for target 'aarch64'`