Backus が 1950年代のコンピュータ事情を回顧していますが、手紙等を調べた結果、色々記憶違いがあって自分がそれまで公言していたことに誤りがあったと正直に述べています。
9.1 の bugfix の模様です。 gcc.gnu.org
Fortran Asynchronous I/O is now fully supported. The program needs to be linked against the pthreads library to use it, otherwise the I/O is done synchronously. For systems which do not support POSIX condition variables, such as AIX, all I/O is still done synchronously. The BACK argument for MINLOC and MAXLOC has been implemented. The FINDLOC intrinsic function has been implemented. The IS_CONTIGUOUS intrinsic function has been implemented. Direct access to the real and imaginary parts of a complex variable via c%re and c%im has been implemented. Type parameter inquiry via str%len and a%kind has been implemented. C descriptors and the ISO_Fortran_binding.h source file have been implemented. The MAX and MIN intrinsics are no longer guaranteed to return any particular value in case one of the arguments is a NaN. Note that this conforms to the Fortran standard and to what other Fortran compilers do. If there is a need to handle that case in some specific way, one needs to explicitly check for NaN's before calling MAX or MIN, e.g. by using the IEEE_IS_NAN function from the intrinsic module IEEE_ARITHMETIC. A new command-line option -fdec-include, set also by the -fdec option, has been added to increase compatibility with legacy code. With this option, an INCLUDE directive is also parsed as a statement, which allows the directive to be spread across multiple source lines with line continuations. A new BUILTIN directive, has been added. The purpose of the directive is to provide an API between the GCC compiler and the GNU C Library which would define vector implementations of math routines.
- 作者: Michael Metcalf,John Reid,Malcolm Cohen
- 出版社/メーカー: Oxford Univ Pr
- 発売日: 2018/11/06
- メディア: ペーパーバック