PR 81552 Improve and document -flag-init-integer
Make the option handling code parse the -flag-init-integer value as a
C long type, allowing a larger range on systems where long is a larger
type than int. Document the behavior.
Regtested on x86_64-pc-linux-gnu, committed as obvious.
2019-02-14 Janne Blomqvist <jb@gcc.gnu.org>
PR fortran/81552
* gfortran.h (gfc_option_t): Make flag_init_integer_value a long.
* options.c (gfc_handle_option): Use strtol instead of atoi.
* invoke.texi: Document -finit-integer behavior in more detail
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@268906 138bc75d-0d04-0410-961f-82ee72b054a4
diff --git a/gcc/fortran/ChangeLog b/gcc/fortran/ChangeLog
index bcf885e..3a8c00d 100644
--- a/gcc/fortran/ChangeLog
+++ b/gcc/fortran/ChangeLog
@@ -1,3 +1,10 @@
+2019-02-14 Janne Blomqvist <jb@gcc.gnu.org>
+
+ PR fortran/81552
+ * gfortran.h (gfc_option_t): Make flag_init_integer_value a long.
+ * options.c (gfc_handle_option): Use strtol instead of atoi.
+ * invoke.texi: Document -finit-integer behavior in more detail.
+
2019-02-14 Harald Anlauf <anlauf@gmx.de>
PR fortran/88248
diff --git a/gcc/fortran/gfortran.h b/gcc/fortran/gfortran.h
index 0a0fef8..526897c 100644
--- a/gcc/fortran/gfortran.h
+++ b/gcc/fortran/gfortran.h
@@ -2681,7 +2681,7 @@
int flag_preprocessed;
int flag_d_lines;
int flag_init_integer;
- int flag_init_integer_value;
+ long flag_init_integer_value;
int flag_init_logical;
int flag_init_character;
char flag_init_character_value;
diff --git a/gcc/fortran/invoke.texi b/gcc/fortran/invoke.texi
index 0e0c2bc..a5d8196 100644
--- a/gcc/fortran/invoke.texi
+++ b/gcc/fortran/invoke.texi
@@ -1779,6 +1779,11 @@
optimizations may convert them into quiet NaN and that trapping
needs to be enabled (e.g. via @option{-ffpe-trap}).
+The @option{-finit-integer} option will parse the value into an
+integer of type @code{INTEGER(kind=C_LONG)} on the host. Said value
+is then assigned to the integer variables in the Fortran code, which
+might result in wraparound if the value is too large for the kind.
+
Finally, note that enabling any of the @option{-finit-*} options will
silence warnings that would have been emitted by @option{-Wuninitialized}
for the affected local variables.
diff --git a/gcc/fortran/options.c b/gcc/fortran/options.c
index 4e55ade..f2a0151 100644
--- a/gcc/fortran/options.c
+++ b/gcc/fortran/options.c
@@ -708,7 +708,7 @@
case OPT_finit_integer_:
gfc_option.flag_init_integer = GFC_INIT_INTEGER_ON;
- gfc_option.flag_init_integer_value = atoi (arg);
+ gfc_option.flag_init_integer_value = strtol (arg, NULL, 10);
break;
case OPT_finit_character_:
