Just ran into this.
A forgotten commit, maybe?
../../../trunk/libgfortran/intrinsics/c99_functions.c: At top level:
../../../trunk/libgfortran/intrinsics/c99_functions.c:1520:1: warning: no
previo
us prototype for 'casinhf'
../../../trunk/libgfortran/intrinsics/c99_functions.c:1530:1: warning: no
previo
us prototype for 'casinh'
../../../trunk/libgfortran/intrinsics/c99_functions.c:1553:1: warning: no
previo
us prototype for 'cacoshf'
../../../trunk/libgfortran/intrinsics/c99_functions.c:1563:1: warning: no
previo
us prototype for 'cacosh'
../../../trunk/libgfortran/intrinsics/c99_functions.c:1586:1: warning: no
previo
us prototype for 'catanhf'
../../../trunk/libgfortran/intrinsics/c99_functions.c:1596:1: warning: no
previo
us prototype for 'catanh'
../../../trunk/libgfortran/intrinsics/c99_functions.c: In function 'catan':
../../../trunk/libgfortran/intrinsics/c99_functions.c:1500:1: warning: control
r
eaches end of non-void function
../../../trunk/libgfortran/intrinsics/c99_functions.c: In function 'catanf':
../../../trunk/libgfortran/intrinsics/c99_functions.c:1490:1: warning: control
r
eaches end of non-void function
../../../trunk/libgfortran/intrinsics/c99_functions.c: In function 'cacos':
../../../trunk/libgfortran/intrinsics/c99_functions.c:1467:1: warning: control
r
eaches end of non-void function
../../../trunk/libgfortran/intrinsics/c99_functions.c: In function 'cacosf':
../../../trunk/libgfortran/intrinsics/c99_functions.c:1457:1: warning: control
r
eaches end of non-void function
../../../trunk/libgfortran/intrinsics/c99_functions.c: In function 'casin':
../../../trunk/libgfortran/intrinsics/c99_functions.c:1434:1: warning: control
r
eaches end of non-void function
../../../trunk/libgfortran/intrinsics/c99_functions.c: In function 'casinf':
../../../trunk/libgfortran/intrinsics/c99_functions.c:1424:1: warning: control
r
eaches end of non-void function
make[3]: *** [c99_functions.lo] Error 1
make[3]: Leaving directory `/home/Thomas/trunk-bin/i686-pc-cygwin/libgfortran'
make[2]: *** [all] Error 2
make[2]: Leaving directory `/home/Thomas/trunk-bin/i686-pc-cygwin/libgfortran'
make[1]: *** [all-target-libgfortran] Error 2
make[1]: Leaving directory `/home/Thomas/trunk-bin'
make: *** [bootstrap] Error 2
--
Summary: [4.5 Regression] Build failure in libgfortran
Product: gcc
Version: 4.5.0
Status: UNCONFIRMED
Keywords: build
Severity: normal
Priority: P3
Component: libfortran
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: tkoenig at gcc dot gnu dot org
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=40863
