Re: [PATCH] CryptoPkg/OpensslLib AARCH64: disable rather than demote format warning

[Ard Biesheuvel <ard.biesheuvel@linaro.org>]

On 27 December 2017 at 09:59, Long, Qin <qin.long@intel.com> wrote:
> This makes sense to me.
> Reviewed-by: Long Qin <qin.long@intel.com>
>

Thanks. Pushed as c24d664dca26

> -----Original Message-----
> From: Ard Biesheuvel [mailto:ard.biesheuvel@linaro.org]
> Sent: Wednesday, December 27, 2017 5:27 PM
> To: edk2-devel@lists.01.org; Long, Qin <qin.long@intel.com>; Ye, Ting <ting.ye@intel.com>
> Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
> Subject: [PATCH] CryptoPkg/OpensslLib AARCH64: disable rather than demote format warning
>
> We recently added -Wno-error=format to the OpenSslLib build script to work around an issue in the upstream OpenSSL code. This does not inhibit the warning, but prevents it from breaking the build by not treating it as a fatal error.
>
> Unfortunately, this interacts poorly with the -Wno-unused-const-variable option that we added to GCC49 and later. Those versions of GCC ignore -Wno-xxxx options that they don't understand, unless warnings are emitted for another reason, in which case the warning is emitted after all, and in our case, this breaks the build when the non-fatal format warning is emitted.
>
> CryptoPkg/Library/OpensslLib/openssl/crypto/asn1/x_int64.c: In function 'uint64_print':
> CryptoPkg/Library/OpensslLib/openssl/crypto/asn1/x_int64.c:105:32: warning: format '%ld' expects argument of type 'long int', but argument 3 has type 'int64_t {aka long long int}' [-Wformat=]
>          return BIO_printf(out, "%"BIO_PRI64"d\n", **(int64_t **)pval);
>                                 ^
> CryptoPkg/Library/OpensslLib/openssl/crypto/asn1/x_int64.c:106:28: warning: format '%lu' expects argument of type 'long unsigned int', but argument 3 has type 'uint64_t {aka long long unsigned int}' [-Wformat=]
>      return BIO_printf(out, "%"BIO_PRI64"u\n", **(uint64_t **)pval);
>                             ^
> CryptoPkg/Library/OpensslLib/openssl/crypto/asn1/x_int64.c: At top level:
> cc1: error: unrecognized command line option '-Wno-unused-const-variable' [-Werror]
> cc1: all warnings being treated as errors
>
> So replace -Wno-error=format with -Wno-format to suppress the warning entirely.
>
> Contributed-under: TianoCore Contribution Agreement 1.1
> Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
> ---
>  CryptoPkg/Library/OpensslLib/OpensslLib.inf       | 6 +++---
>  CryptoPkg/Library/OpensslLib/OpensslLibCrypto.inf | 6 +++---
>  2 files changed, 6 insertions(+), 6 deletions(-)
>
> diff --git a/CryptoPkg/Library/OpensslLib/OpensslLib.inf b/CryptoPkg/Library/OpensslLib/OpensslLib.inf
> index 602953eefff7..f3eb19afd34e 100644
> --- a/CryptoPkg/Library/OpensslLib/OpensslLib.inf
> +++ b/CryptoPkg/Library/OpensslLib/OpensslLib.inf
> @@ -557,10 +557,10 @@ [BuildOptions]
>    #                   types appropriate to the format string specified.
>    #
>    GCC:*_*_IA32_CC_FLAGS    = -U_WIN32 -U_WIN64 $(OPENSSL_FLAGS) -Wno-error=maybe-uninitialized
> -  GCC:*_*_X64_CC_FLAGS     = -U_WIN32 -U_WIN64 $(OPENSSL_FLAGS) -Wno-error=maybe-uninitialized -Wno-error=format -DNO_MSABI_VA_FUNCS
> -  GCC:*_*_IPF_CC_FLAGS     = -U_WIN32 -U_WIN64 $(OPENSSL_FLAGS) -Wno-error=maybe-uninitialized -Wno-error=format
> +  GCC:*_*_X64_CC_FLAGS     = -U_WIN32 -U_WIN64 $(OPENSSL_FLAGS) -Wno-error=maybe-uninitialized -Wno-format -DNO_MSABI_VA_FUNCS
> +  GCC:*_*_IPF_CC_FLAGS     = -U_WIN32 -U_WIN64 $(OPENSSL_FLAGS) -Wno-error=maybe-uninitialized -Wno-format
>    GCC:*_*_ARM_CC_FLAGS     = $(OPENSSL_FLAGS)
> -  GCC:*_*_AARCH64_CC_FLAGS = $(OPENSSL_FLAGS) -Wno-error=format
> +  GCC:*_*_AARCH64_CC_FLAGS = $(OPENSSL_FLAGS) -Wno-format
>
>    # suppress the following warnings in openssl so we don't break the build with warnings-as-errors:
>    # 1295: Deprecated declaration <entity> - give arg types diff --git a/CryptoPkg/Library/OpensslLib/OpensslLibCrypto.inf b/CryptoPkg/Library/OpensslLib/OpensslLibCrypto.inf
> index f697243f9787..88134b5b5ff3 100644
> --- a/CryptoPkg/Library/OpensslLib/OpensslLibCrypto.inf
> +++ b/CryptoPkg/Library/OpensslLib/OpensslLibCrypto.inf
> @@ -518,10 +518,10 @@ [BuildOptions]
>    #                   types appropriate to the format string specified.
>    #
>    GCC:*_*_IA32_CC_FLAGS    = -U_WIN32 -U_WIN64 $(OPENSSL_FLAGS) -Wno-error=maybe-uninitialized
> -  GCC:*_*_X64_CC_FLAGS     = -U_WIN32 -U_WIN64 $(OPENSSL_FLAGS) -Wno-error=maybe-uninitialized -Wno-error=format -DNO_MSABI_VA_FUNCS
> -  GCC:*_*_IPF_CC_FLAGS     = -U_WIN32 -U_WIN64 $(OPENSSL_FLAGS) -Wno-error=maybe-uninitialized -Wno-error=format
> +  GCC:*_*_X64_CC_FLAGS     = -U_WIN32 -U_WIN64 $(OPENSSL_FLAGS) -Wno-error=maybe-uninitialized -Wno-format -DNO_MSABI_VA_FUNCS
> +  GCC:*_*_IPF_CC_FLAGS     = -U_WIN32 -U_WIN64 $(OPENSSL_FLAGS) -Wno-error=maybe-uninitialized -Wno-format
>    GCC:*_*_ARM_CC_FLAGS     = $(OPENSSL_FLAGS)
> -  GCC:*_*_AARCH64_CC_FLAGS = $(OPENSSL_FLAGS) -Wno-error=format
> +  GCC:*_*_AARCH64_CC_FLAGS = $(OPENSSL_FLAGS) -Wno-format
>
>    # suppress the following warnings in openssl so we don't break the build with warnings-as-errors:
>    # 1295: Deprecated declaration <entity> - give arg types
> --
> 2.11.0
>