Dear GRUB folks,
Building GRUB from the master branch fails with clang 7.0.1 fails with the error below. The error is not shown with clang 6.0.1. ``` $ ./autogen.sh $ ./configure CC=clang $ make -j`nproc` […] clang -DHAVE_CONFIG_H -I. -I.. -Wall -W -DGRUB_MACHINE_PCBIOS=1 -DGRUB_MACHINE=I386_PC -m32 -msoft-float -Xclang -msoft-float -Xclang -no-implicit-float -nostdinc -isystem /usr/lib/clang/7.0.1/include -I../include -I../include -DGRUB_FILE=\"bus/cs5536.c\" -I. -I. -I.. -I.. -I../include -I../include -I../grub-core/lib/libgcrypt-grub/src/ -D_FILE_OFFSET_BITS=64 -Os -Wall -W -Wshadow -Wpointer-arith -Wundef -Wchar-subscripts -Wcomment -Wdeprecated-declarations -Wdisabled-optimization -Wdiv-by-zero -Wfloat-equal -Wformat-extra-args -Wformat-security -Wformat-y2k -Wimplicit -Wimplicit-function-declaration -Wimplicit-int -Wmain -Wmissing-braces -Wmissing-format-attribute -Wmultichar -Wparentheses -Wreturn-type -Wsequence-point -Wshadow -Wsign-compare -Wswitch -Wtrigraphs -Wunknown-pragmas -Wunused -Wunused-function -Wunused-label -Wunused-parameter -Wunused-value -Wunused-variable -Wwrite-strings -Wnested-externs -Wstrict-prototypes -g -Wredundant-decls -Wmissing-prototypes -Wmissing-declarations -Wextra -Wattributes -Wendif-labels -Winit-self -Wint-to-pointer-cast -Winvalid-pch -Wmissing-field-initializers -Wnonnull -Woverflow -Wvla -Wpointer-to-int-cast -Wstrict-aliasing -Wvariadic-macros -Wvolatile-register-var -Wpointer-sign -Wmissing-include-dirs -Wmissing-prototypes -Wmissing-declarations -Wformat=2 -march=i386 -m32 -malign-jumps=1 -malign-loops=1 -malign-functions=1 -freg-struct-return -mno-mmx -mno-sse -mno-sse2 -mno-sse3 -mno-3dnow -fno-dwarf2-cfi-asm -mno-stack-arg-probe -fno-asynchronous-unwind-tables -fno-unwind-tables -Qn -fno-stack-protector -Werror -ffreestanding -MT bus/cs5536_module-cs5536.o -MD -MP -MF bus/.deps-core/cs5536_module-cs5536.Tpo -c -o bus/cs5536_module-cs5536.o `test -f 'bus/cs5536.c' || echo './'`bus/cs5536.c clang-7grep 'MARKER' gcry_twofish.marker.new > gcry_twofish.marker; rm -f gcry_twofish.marker.new : error: argument unused during compilation: '-Qn' [-Werror,-Wunused-command-line-argument] make[3]: *** [Makefile:28232: trig.module] Error 1 ``` Kind regards, Paul
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