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RE: selective linking of floating point support for *printf / *scanf
- From: "Thomas Preud'homme" <thomas dot preudhomme at arm dot com>
- To: "Thomas Preud'homme" <Thomas dot Preudhomme at arm dot com>, "'Grissiom'" <chaos dot proton at gmail dot com>, "Eric Blake" <eblake at redhat dot com>
- Cc: "Joern Rennecke" <joern dot rennecke at embecosm dot com>, "GCC" <gcc at gcc dot gnu dot org>, "Joerg Wunsch" <joerg_wunsch at uriah dot heep dot sax dot de>, <avr-libc-dev at nongnu dot org>, "Andrew Burgess" <andrew dot burgess at embecosm dot com>, <newlib at sourceware dot org>
- Date: Sat, 30 Aug 2014 12:44:52 +0800
- Subject: RE: selective linking of floating point support for *printf / *scanf
- Authentication-results: sourceware.org; auth=none
- References: <CAMqJFCpWKXVmmc-YLKf9XO6H8C_YnTEcgzkJAidE21MirJbi-w at mail dot gmail dot com> <001401cfc0f9$bdc5cbc0$39516340$ at arm dot com> <CAMqJFCrEOgavwvW25vO=S-+0TZ_xOnDa0Ex-Ff4XG329K5WE9g at mail dot gmail dot com> <001901cfc1c4$d0678630$71369290$ at arm dot com> <CAMqJFCoFC8sVRQB3+v4dzSVc5LLs9cycjm621FmM34gGHRWFng at mail dot gmail dot com> <000001cfc1e3$7f1a22f0$7d4e68d0$ at arm dot com> <CAMqJFCo1EA8TLVsv=r7gW-udiH6pqBKVuQUvHeGcFDqrnMo_EQ at mail dot gmail dot com> <000101cfc281$3a3008f0$ae901ad0$ at arm dot com> <CAMqJFCrrj1_VHmz7G-VgDpLNGjsTtdjPLqbCRY1oVxeO-BESHw at mail dot gmail dot com> <000201cfc34f$1ceadb20$56c09160$ at arm dot com> <54007E28 dot 6090106 at redhat dot com> <CALC6sNDiJ+EOjTasMj2YCQmq10mVQrZKKsaUurhjQe=Zbn435g at mail dot gmail dot com> <000401cfc40a$a22255f0$e66701d0$ at arm dot com>
> -----Original Message-----
> From: gcc-owner@gcc.gnu.org [mailto:gcc-owner@gcc.gnu.org] On Behalf
> Of Thomas Preud'homme
> Sent: Saturday, August 30, 2014 12:27 PM
> Mmmh indeed. I checked C99 and section 7.1.3 paragraph 1 third clause
> states:
>
> "All identifiers that begin with an underscore and either an uppercase letter
> or
> another underscore are always reserved for any use."
>
> Next clause express how single underscore not followed by a capital letter
> is
> reserved:
>
> "All identifiers that begin with an underscore are always reserved for use as
> identifiers
> with file scope in both the ordinary and tag name spaces."
>
> Since here we are talking about linkage, _printf_float is not safe according
> to the
> standard.
Sorry for restating what Eric Blake already said, I didn't see his message at
first as it was (surprisingly) classified as spam.
Best regards,
Thomas