main/ngrep: fix build

main/ngrep/APKBUILD

@@ -11,7 +11,9 @@ license="custom"
 makedepends="autoconf automake libpcap-dev pcre-dev"
 options="!check"
 subpackages="$pkgname-dbg $pkgname-doc"
-source="$pkgname-$pkgver.tar.gz::https://github.com/jpr5/ngrep/archive/V$_pkgver.tar.gz"
+source="$pkgname-$pkgver.tar.gz::https://github.com/jpr5/ngrep/archive/V$_pkgver.tar.gz
+	inc.patch
+	"
 builddir="$srcdir"/$pkgname-$_pkgver
 
 prepare() {
@@ -40,4 +42,7 @@ package() {
 	install -Dm644 LICENSE "$pkgdir"/usr/share/licenses/$pkgname/LICENSE
 }
 
-sha512sums="47ba65878df6b555701c866721a8a935eabdcce636d398284cbfe5f63baf68c62d994a2f373ea4fc8f44fbed3eecee149f2ee48d39c71c04d34e5a088db8c657  ngrep-1.47.tar.gz"
+sha512sums="
+47ba65878df6b555701c866721a8a935eabdcce636d398284cbfe5f63baf68c62d994a2f373ea4fc8f44fbed3eecee149f2ee48d39c71c04d34e5a088db8c657  ngrep-1.47.tar.gz
+0e6e5d5c018f1aebefd764091158d3b5bb0fda0463cc1fc4062690d653422b920be374ce49535459bfc48b2509e4a95903392de482bb8b15ef831cf6c2eb3392  inc.patch
+"

main/ngrep/inc.patch

@@ -0,0 +1,21 @@
+otherwise, building the regex library fails on missing config.h:
+
+    gcc -Iregex-0.12 -I/usr/include/pcap -Os -fomit-frame-pointer -g -DSTDC_HEADERS -I. -DHAVE_CONFIG_H -DLINUX  -D_BSD_SOURCE=1 -D__FAVOR_BSD=1 -Os -fomit-frame-pointer  -c -o regex.o regex.c
+    regex.c:43:10: fatal error: config.h: No such file or directory
+       43 | #include "config.h"
+          |          ^~~~~~~~~~
+    compilation terminated.
+
+
+
+--- a/Makefile.in
++++ b/Makefile.in
+@@ -6,7 +6,7 @@
+ CC=@CC@
+ 
+ CPPFLAGS = @DEFS@ -D@OS@ @EXTRA_DEFINES@ @CPPFLAGS@
+-CFLAGS   = @EXTRA_INCLUDES@ @CFLAGS@ 
++CFLAGS   = @EXTRA_INCLUDES@ @CFLAGS@ -I@abs_srcdir@
+ LDFLAGS  = @EXTRA_LDFLAGS@ @LDFLAGS@
+ LIBS     = @LIBS@ @EXTRA_LIBS@
+