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build: clean up AC_PACKAGE_WANT_GDBM

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The AC_PACKAGE_WANT_GDBM macro is not easily read. It's not doing
anything particularly complex other than working through a set of
alternatives for headers and libraries.

This patch cleans it up to be more readable.  We also only attempt
to check in libgdbm_compat if the checks in libgdbm fail.

Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Reviewed-by: Eryu Guan <guaneryu@gmail.com>
Signed-off-by: Eryu Guan <guaneryu@gmail.com>
This commit is contained in:
Jeff Mahoney
2018-03-15 17:54:54 -04:00
committed by Eryu Guan
parent 156dafb888
commit 3a670ba142
1 changed files with 55 additions and 32 deletions
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m4/package_gdbmdev.m4
+55 -32
View File
@@ -1,43 +1,66 @@
AC_DEFUN([AC_PACKAGE_WANT_GDBM], AC_DEFUN([AC_PACKAGE_WANT_GDBM],
[ AC_CHECK_HEADER(gdbm-ndbm.h, [ gdbm_ndbm=true; have_db=true ], [ gdbm_ndbm=false; have_db=false ]) [
have_db=
AC_CHECK_HEADER(gdbm-ndbm.h,
[
have_db=true
AC_DEFINE(HAVE_GDBM_NDBM_H, [1],
[Define to 1 if you have the <gdbm-ndbm.h> header file.])
])
if test $gdbm_ndbm = true; then if test -z "$have_db"; then
AC_DEFINE(HAVE_GDBM_NDBM_H, [1], [Define to 1 if you have the <gdbm-ndbm.h> header file.]) dnl gdbm-ndbm.h and gdbm/ndbm.h map to the same autoconf internal
else dnl variable. We need to clear it or this test will be skipped
AS_UNSET([ac_cv_header_gdbm_ndbm_h]) dnl and the cached result from first test will be used.
AC_CHECK_HEADER(gdbm/ndbm.h, [ gdbm_ndbm_=true; have_db=true ], [ gdbm_ndbm_=false; have_db=false ]) AS_UNSET([ac_cv_header_gdbm_ndbm_h])
if test $gdbm_ndbm_ = true; then AC_CHECK_HEADER(gdbm/ndbm.h,
AC_DEFINE(HAVE_GDBM_NDBM_H_, [1], [Define to 1 if you have the <gdbm/ndbm.h> header file.]) [
else have_db=true
AC_CHECK_HEADER(gdbm.h, [ gdbm_ndbm_=true; have_db=true ], [ gdbm_ndbm_=false; have_db=false ]) AC_DEFINE(HAVE_GDBM_NDBM_H_, [1],
AC_CHECK_HEADER(ndbm.h, [ ndbm_=true ], [ ndbm_=false ]) [Define to 1 if you have the <gdbm/ndbm.h> header file.])
if test $gdbm_ndbm_ = true; then ])
if test $ndbm_ = true; then
AC_DEFINE(HAVE_GDBM_H, [1], [Define to 1 if you have both <gdbm.h> and <ndbm.h> header files.])
fi
fi
fi
fi fi
found=false if test -z "$have_db"; then
libgdbm="" AC_CHECK_HEADER(gdbm.h,
[
have_db=true
gdbm_ndbm_=true
], [
have_db=false
gdbm_ndbm_=false
])
AC_CHECK_HEADER(ndbm.h,
[
ndbm_=true
], [
ndbm_=false
])
if test $gdbm_ndbm_ = true; then
if test $ndbm_ = true; then
AC_DEFINE(HAVE_GDBM_H, [1],
[Define to 1 if you have both <gdbm.h> and <ndbm.h> header files.])
fi
fi
fi
if test $have_db = true; then if test "$have_db" = true; then
AC_CHECK_LIB(gdbm,dbm_open,found=true,found=false) found=false
AC_CHECK_LIB(gdbm,dbm_fetch,,found=false) AC_CHECK_LIB(gdbm, dbm_open, found=true, found=false)
AC_CHECK_LIB(gdbm,dbm_store,,found=false) AC_CHECK_LIB(gdbm, dbm_fetch,, found=false)
AC_CHECK_LIB(gdbm,dbm_close,,found=false) AC_CHECK_LIB(gdbm, dbm_store,, found=false)
AC_CHECK_LIB(gdbm, dbm_close,, found=false)
if test $found = true; then if test "$found" = true; then
libgdbm="${libgdbm} -lgdbm" libgdbm="-lgdbm"
else else
AC_CHECK_LIB(gdbm_compat,dbm_open,found=true,found=false,-lgdbm) AC_CHECK_LIB(gdbm_compat, dbm_open, found=true, found=false, -lgdbm)
AC_CHECK_LIB(gdbm_compat,dbm_fetch,,found=false,-lgdbm) AC_CHECK_LIB(gdbm_compat, dbm_fetch,, found=false, -lgdbm)
AC_CHECK_LIB(gdbm_compat,dbm_store,,found=false,-lgdbm) AC_CHECK_LIB(gdbm_compat, dbm_store,, found=false, -lgdbm)
AC_CHECK_LIB(gdbm_compat,dbm_close,,found="false",-lgdbm) AC_CHECK_LIB(gdbm_compat, dbm_close,, found="no", -lgdbm)
if test $found = true ; then if test "$found" = "true"; then
libgdbm="${libgdbm} -lgdbm_compat -lgdbm" libgdbm="-lgdbm_compat -lgdbm"
fi fi
fi fi
fi fi