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configure: Use CFLAGS_FOR_BUILD when checking native compiler

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This fixes a bug where configure would fail or disable static
ecmult tables because it wrongly checks the native compiler using
the target CFLAGS (instead of the native CFLAGS_FOR_BUILD), and
similar for CPPFLAGS and LDFLAGS.

Moreover, this commit adds tests to figure out whether the native
compiler supports the warning flags passed during the build, and it
contains a few minor improvements to the code that checks the native
compiler.
This commit is contained in:
Tim Ruffing
2019-01-16 17:12:38 +01:00
parent e34ceb333b
commit 2d5f4cebdc
2 changed files with 34 additions and 8 deletions
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1
Makefile.am
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@@ -151,7 +151,6 @@ endif
if USE_ECMULT_STATIC_PRECOMPUTATION
CPPFLAGS_FOR_BUILD +=-I$(top_srcdir)
CFLAGS_FOR_BUILD += -Wall -Wextra -Wno-unused-function
gen_context_OBJECTS = gen_context.o
gen_context_BIN = gen_context$(BUILD_EXEEXT)