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From https://github.com/axboe/liburing/commit/09b8ded9686f33f1044ad8c612f2281b865cd314 Mon Sep 17 00:00:00 2001
From: Violet Purcell <vimproved@inventati.org>
Date: Sat, 16 Dec 2023 16:17:09 -0500
Subject: [PATCH] Link against libgcc based on output of
-print-libgcc-file-name
GCC and clang have the -print-libgcc-file-name option to automatically
print out the correct compiler runtime library to link to. This can be
helpful in case the runtime library is named something other than libgcc
(i.e. on a system where only LLVM's compiler-rt is used), or if libgcc
is in a non-standard directory. If the option fails for whatever reason,
fall back to using "-lgcc".
Signed-off-by: Violet Purcell <vimproved@inventati.org>
--- a/configure
+++ b/configure
@@ -202,6 +202,15 @@ print_and_output_mak "relativelibdir" "$relativelibdir"
print_and_output_mak "mandir" "$mandir"
print_and_output_mak "datadir" "$datadir"
+####################################################
+# Check for correct compiler runtime library to link with
+libgcc_link_flag="-lgcc"
+if $cc -print-libgcc-file-name >/dev/null 2>&1; then
+ libgcc_link_flag="$($cc $CFLAGS $LDFLAGS -print-libgcc-file-name)"
+fi
+print_and_output_mak "libgcc_link_flag" "$libgcc_link_flag"
+####################################################
+
##########################################
# check for compiler -Wstringop-overflow
stringop_overflow="no"
--- a/src/Makefile
+++ b/src/Makefile
@@ -47,7 +47,7 @@ ifeq ($(CONFIG_NOLIBC),y)
liburing_srcs += nolibc.c
override CFLAGS += -nostdlib -nodefaultlibs -ffreestanding -fno-builtin -fno-stack-protector
override CPPFLAGS += -nostdlib -nodefaultlibs -ffreestanding -fno-builtin -fno-stack-protector
- override LINK_FLAGS += -nostdlib -nodefaultlibs -lgcc
+ override LINK_FLAGS += -nostdlib -nodefaultlibs $(libgcc_link_flag)
endif
override CPPFLAGS += -MT "$@" -MMD -MP -MF "$@.d"
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