diff options
Diffstat (limited to 'Makerules')
| -rw-r--r-- | Makerules | 24 |
1 files changed, 24 insertions, 0 deletions
@@ -109,6 +109,30 @@ endif # avoid-generated endif # $(build-shared) = yes ifndef avoid-generated +ifneq (,$(CXX)) +# If C++ headers <cstdlib> or <cmath> are used, GCC 6 will include +# /usr/include/stdlib.h or /usr/include/math.h from "#include_next" +# (instead of stdlib/stdlib.h or math/math.h in the glibc source +# directory), and this turns up as a make dependency. An implicit +# rule will kick in and make will try to install stdlib/stdlib.h or +# math/math.h as /usr/include/stdlib.h or /usr/include/math.h because +# the target is out of date. We make a copy of <cstdlib> and <cmath> +# in the glibc build directory so that stdlib/stdlib.h and math/math.h +# will be used instead of /usr/include/stdlib.h and /usr/include/math.h. +before-compile := $(common-objpfx)cstdlib $(common-objpfx)cmath \ + $(before-compile) +cstdlib=$(shell echo "\#include <cstdlib>" | $(CXX) -M -MP -x c++ - \ + | sed -n "/cstdlib:/{s/:$$//;p}") +$(common-objpfx)cstdlib: $(cstdlib) + $(INSTALL_DATA) $< $@T + $(move-if-change) $@T $@ +cmath=$(shell echo "\#include <cmath>" | $(CXX) -M -MP -x c++ - \ + | sed -n "/cmath:/{s/:$$//;p}") +$(common-objpfx)cmath: $(cmath) + $(INSTALL_DATA) $< $@T + $(move-if-change) $@T $@ +endif + before-compile := $(common-objpfx)libc-abis.h $(before-compile) $(common-objpfx)libc-abis.h: $(common-objpfx)libc-abis.stamp; @: $(common-objpfx)libc-abis.stamp: $(..)scripts/gen-libc-abis \ |