bpo-32635: Fix a segfault when importing the crypt module with libxcrypt. (#5284)
glibc is deprecating libcrypt in favor of libxcrypt, however python assumes
that crypt.h will always be included. This change makes the header inclusion
explicit when libxcrypt is present on the system.
diff --git a/Include/Python.h b/Include/Python.h
index dd595ea..1feb153 100644
--- a/Include/Python.h
+++ b/Include/Python.h
@@ -35,6 +35,9 @@
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
+#ifdef HAVE_CRYPT_H
+#include <crypt.h>
+#endif
/* For size_t? */
#ifdef HAVE_STDDEF_H
diff --git a/Misc/NEWS.d/next/Build/2018-01-23-15-33-40.bpo-32635.qHwIZy.rst b/Misc/NEWS.d/next/Build/2018-01-23-15-33-40.bpo-32635.qHwIZy.rst
new file mode 100644
index 0000000..d411890
--- /dev/null
+++ b/Misc/NEWS.d/next/Build/2018-01-23-15-33-40.bpo-32635.qHwIZy.rst
@@ -0,0 +1,2 @@
+Fix segfault of the crypt module when libxcrypt is provided instead of
+libcrypt at the system.
diff --git a/configure b/configure
index a9b0ab9..5904b54 100755
--- a/configure
+++ b/configure
@@ -7682,7 +7682,7 @@
fi
-for ac_header in asm/types.h conio.h direct.h dlfcn.h errno.h \
+for ac_header in asm/types.h crypt.h conio.h direct.h dlfcn.h errno.h \
fcntl.h grp.h \
ieeefp.h io.h langinfo.h libintl.h process.h pthread.h \
sched.h shadow.h signal.h stropts.h termios.h \
diff --git a/configure.ac b/configure.ac
index 03b0f50..15ef872 100644
--- a/configure.ac
+++ b/configure.ac
@@ -2041,7 +2041,7 @@
# checks for header files
AC_HEADER_STDC
-AC_CHECK_HEADERS(asm/types.h conio.h direct.h dlfcn.h errno.h \
+AC_CHECK_HEADERS(asm/types.h crypt.h conio.h direct.h dlfcn.h errno.h \
fcntl.h grp.h \
ieeefp.h io.h langinfo.h libintl.h process.h pthread.h \
sched.h shadow.h signal.h stropts.h termios.h \
diff --git a/pyconfig.h.in b/pyconfig.h.in
index dd7c62b..fd5a0c3 100644
--- a/pyconfig.h.in
+++ b/pyconfig.h.in
@@ -140,6 +140,9 @@
/* Define to 1 if you have the `copysign' function. */
#undef HAVE_COPYSIGN
+/* Define to 1 if you have the <crypt.h> header file. */
+#undef HAVE_CRYPT_H
+
/* Define to 1 if you have the `ctermid' function. */
#undef HAVE_CTERMID