From: Chao-ying Fu <[email protected]>
Introduce the -mclib option for newlib, small, and tiny C library
configurations. For small and tiny libraries, define the corresponding
preprocessor macros and infer -mnan=2008 for hard-float builds.
gcc/ChangeLog:
* config/mips/mips-opts.h: Add enum mips_lib_setting.
* config/mips/mips.h (TARGET_CPU_CPP_BUILTINS): Define
__mips_clib_small or __mips_clib_tiny based on the used C
library.
(MIPS_ISA_NAN2008_SPEC): Infer a -mnan=2008 setting if
mclib is small or tiny for hard-float.
* config/mips/mips.opt: Add -mclib option.
Cherry-picked 3c800e0a3278de913ccefa7eed6eb070d4f7c558
from https://github.com/MIPS/gcc
Signed-off-by: Jaydeep Patil <[email protected]>
Signed-off-by: Faraz Shahbazker <[email protected]>
Signed-off-by: Chao-ying Fu <[email protected]>
Signed-off-by: Aleksandar Rakic <[email protected]>
Signed-off-by: Eldar Osmanovic <[email protected]>
---
gcc/config/mips/mips-opts.h | 7 +++++++
gcc/config/mips/mips.h | 10 ++++++++--
gcc/config/mips/mips.opt | 17 +++++++++++++++++
3 files changed, 32 insertions(+), 2 deletions(-)
diff --git a/gcc/config/mips/mips-opts.h b/gcc/config/mips/mips-opts.h
index d8b1b4c632c..63ed6383124 100644
--- a/gcc/config/mips/mips-opts.h
+++ b/gcc/config/mips/mips-opts.h
@@ -60,4 +60,11 @@ enum mips_explicit_relocs {
MIPS_EXPLICIT_RELOCS_BASE,
MIPS_EXPLICIT_RELOCS_PCREL
};
+
+/* Enumerates the setting of the -mclib= option. */
+enum mips_lib_setting {
+ MIPS_LIB_NEWLIB,
+ MIPS_LIB_SMALL,
+ MIPS_LIB_TINY
+};
#endif
diff --git a/gcc/config/mips/mips.h b/gcc/config/mips/mips.h
index 48a562f2d39..ae34159ed37 100644
--- a/gcc/config/mips/mips.h
+++ b/gcc/config/mips/mips.h
@@ -611,6 +611,12 @@ struct mips_cpu_info {
if (mips_nan == MIPS_IEEE_754_2008) \
builtin_define ("__mips_nan2008"); \
\
+ if (mips_c_lib == MIPS_LIB_SMALL)
\
+ builtin_define ("__mips_clib_small"); \
+ \
+ if (mips_c_lib == MIPS_LIB_TINY) \
+ builtin_define ("__mips_clib_tiny"); \
+ \
if (TARGET_BIG_ENDIAN) \
{ \
builtin_define_std ("MIPSEB"); \
@@ -881,8 +887,8 @@ struct mips_cpu_info {
/* Infer a -mnan=2008 setting from a -mips argument. */
#define MIPS_ISA_NAN2008_SPEC \
- "%{mnan*:;mips32r6|mips64r6:-mnan=2008;march=m51*: \
- %{!msoft-float:-mnan=2008}}"
+ "%{mnan*:;mips32r6|mips64r6:-mnan=2008; \
+ march=m51*|mclib=small|mclib=tiny:%{!msoft-float:-mnan=2008}}"
#if (MIPS_ABI_DEFAULT == ABI_O64 \
|| MIPS_ABI_DEFAULT == ABI_N32 \
diff --git a/gcc/config/mips/mips.opt b/gcc/config/mips/mips.opt
index eb14761ea27..9f6849d1b5e 100644
--- a/gcc/config/mips/mips.opt
+++ b/gcc/config/mips/mips.opt
@@ -512,3 +512,20 @@ Use Loongson EXTension (EXT) instructions.
mloongson-ext2
Target Var(TARGET_LOONGSON_EXT2)
Use Loongson EXTension R2 (EXT2) instructions.
+
+mclib=
+Target RejectNegative Joined Var(mips_c_lib) ToLower Enum(mips_lib_setting)
Init(MIPS_LIB_NEWLIB)
+Specify the C library to use with this application.
+
+Enum
+Name(mips_lib_setting) Type(enum mips_lib_setting)
+Known MIPS C libraries (for use with the -mclib= option):
+
+EnumValue
+Enum(mips_lib_setting) String(newlib) Value(MIPS_LIB_NEWLIB)
+
+EnumValue
+Enum(mips_lib_setting) String(small) Value(MIPS_LIB_SMALL)
+
+EnumValue
+Enum(mips_lib_setting) String(tiny) Value(MIPS_LIB_TINY)
--
2.43.0
