cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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Makefile.compiler (2751B)

      1# SPDX-License-Identifier: GPL-2.0-only
      2
      3# cc-cross-prefix
      4# Usage: CROSS_COMPILE := $(call cc-cross-prefix, m68k-linux-gnu- m68k-linux-)
      5# Return first <prefix> where a <prefix>gcc is found in PATH.
      6# If no gcc found in PATH with listed prefixes return nothing
      7#
      8# Note: '2>/dev/null' is here to force Make to invoke a shell. Otherwise, it
      9# would try to directly execute the shell builtin 'command'. This workaround
     10# should be kept for a long time since this issue was fixed only after the
     11# GNU Make 4.2.1 release.
     12cc-cross-prefix = $(firstword $(foreach c, $(1), \
     13			$(if $(shell command -v -- $(c)gcc 2>/dev/null), $(c))))
     14
     15# output directory for tests below
     16TMPOUT = $(if $(KBUILD_EXTMOD),$(firstword $(KBUILD_EXTMOD))/).tmp_$$$$
     17
     18# try-run
     19# Usage: option = $(call try-run, $(CC)...-o "$$TMP",option-ok,otherwise)
     20# Exit code chooses option. "$$TMP" serves as a temporary file and is
     21# automatically cleaned up.
     22try-run = $(shell set -e;		\
     23	TMP=$(TMPOUT)/tmp;		\
     24	mkdir -p $(TMPOUT);		\
     25	trap "rm -rf $(TMPOUT)" EXIT;	\
     26	if ($(1)) >/dev/null 2>&1;	\
     27	then echo "$(2)";		\
     28	else echo "$(3)";		\
     29	fi)
     30
     31# as-option
     32# Usage: cflags-y += $(call as-option,-Wa$(comma)-isa=foo,)
     33
     34as-option = $(call try-run,\
     35	$(CC) $(KBUILD_CFLAGS) $(1) -c -x assembler /dev/null -o "$$TMP",$(1),$(2))
     36
     37# as-instr
     38# Usage: cflags-y += $(call as-instr,instr,option1,option2)
     39
     40as-instr = $(call try-run,\
     41	printf "%b\n" "$(1)" | $(CC) $(KBUILD_AFLAGS) -c -x assembler -o "$$TMP" -,$(2),$(3))
     42
     43# __cc-option
     44# Usage: MY_CFLAGS += $(call __cc-option,$(CC),$(MY_CFLAGS),-march=winchip-c6,-march=i586)
     45__cc-option = $(call try-run,\
     46	$(1) -Werror $(2) $(3) -c -x c /dev/null -o "$$TMP",$(3),$(4))
     47
     48# cc-option
     49# Usage: cflags-y += $(call cc-option,-march=winchip-c6,-march=i586)
     50
     51cc-option = $(call __cc-option, $(CC),\
     52	$(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS),$(1),$(2))
     53
     54# cc-option-yn
     55# Usage: flag := $(call cc-option-yn,-march=winchip-c6)
     56cc-option-yn = $(call try-run,\
     57	$(CC) -Werror $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) $(1) -c -x c /dev/null -o "$$TMP",y,n)
     58
     59# cc-disable-warning
     60# Usage: cflags-y += $(call cc-disable-warning,unused-but-set-variable)
     61cc-disable-warning = $(call try-run,\
     62	$(CC) -Werror $(KBUILD_CPPFLAGS) $(KBUILD_CFLAGS) -W$(strip $(1)) -c -x c /dev/null -o "$$TMP",-Wno-$(strip $(1)))
     63
     64# cc-ifversion
     65# Usage:  EXTRA_CFLAGS += $(call cc-ifversion, -lt, 0402, -O1)
     66cc-ifversion = $(shell [ $(CONFIG_GCC_VERSION)0 $(1) $(2)000 ] && echo $(3) || echo $(4))
     67
     68# ld-option
     69# Usage: KBUILD_LDFLAGS += $(call ld-option, -X, -Y)
     70ld-option = $(call try-run, $(LD) $(KBUILD_LDFLAGS) $(1) -v,$(1),$(2),$(3))
     71
     72# ld-ifversion
     73# Usage:  $(call ld-ifversion, -ge, 22252, y)
     74ld-ifversion = $(shell [ $(CONFIG_LD_VERSION)0 $(1) $(2)0 ] && echo $(3) || echo $(4))