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build: Bump MSVC warning level up to W3 #1328

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May 26, 2023
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build: Bump MSVC warning level up to W3 #1328

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6 changes: 5 additions & 1 deletion CMakeLists.txt
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Original file line number Diff line number Diff line change
Expand Up @@ -212,8 +212,12 @@ endif()
include(TryAppendCFlags)
if(MSVC)
# Keep the following commands ordered lexicographically.
try_append_c_flags(/W2) # Moderate warning level.
try_append_c_flags(/W3) # Production quality warning level.
try_append_c_flags(/wd4146) # Disable warning C4146 "unary minus operator applied to unsigned type, result still unsigned".
try_append_c_flags(/wd4244) # Disable warning C4244 "'conversion' conversion from 'type1' to 'type2', possible loss of data".
try_append_c_flags(/wd4267) # Disable warning C4267 "'var' : conversion from 'size_t' to 'type', possible loss of data".
# Eliminate deprecation warnings for the older, less secure functions.
add_compile_definitions(_CRT_SECURE_NO_WARNINGS)
else()
# Keep the following commands ordered lexicographically.
try_append_c_flags(-pedantic)
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7 changes: 6 additions & 1 deletion configure.ac
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Expand Up @@ -121,7 +121,12 @@ AC_DEFUN([SECP_TRY_APPEND_DEFAULT_CFLAGS], [
# libtool makes the same assumption internally.
# Note that "/opt" and "-opt" are equivalent for MSVC; we use "-opt" because "/opt" looks like a path.
if test x"$GCC" != x"yes" && test x"$build_windows" = x"yes"; then
SECP_TRY_APPEND_CFLAGS([-W2 -wd4146], $1) # Moderate warning level, disable warning C4146 "unary minus operator applied to unsigned type, result still unsigned"
SECP_TRY_APPEND_CFLAGS([-W3], $1) # Production quality warning level.
SECP_TRY_APPEND_CFLAGS([-wd4146], $1) # Disable warning C4146 "unary minus operator applied to unsigned type, result still unsigned".
SECP_TRY_APPEND_CFLAGS([-wd4244], $1) # Disable warning C4244 "'conversion' conversion from 'type1' to 'type2', possible loss of data".
SECP_TRY_APPEND_CFLAGS([-wd4267], $1) # Disable warning C4267 "'var' : conversion from 'size_t' to 'type', possible loss of data".
# Eliminate deprecation warnings for the older, less secure functions.
CPPFLAGS="-D_CRT_SECURE_NO_WARNINGS $CPPFLAGS"
# We pass -ignore:4217 to the MSVC linker to suppress warning 4217 when
# importing variables from a statically linked secp256k1.
# (See the libtool manual, section "Windows DLLs" for background.)
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